Learn options the way experts see them: 39 strategies, live payoff, all on Nifty 23,000
Click any strategy and its payoff chart, breakevens, Greeks and real-life rupee example change instantly. Then work through 131 short topics, from what a call is to volatility surfaces, adjustments, backtesting and SEBI rules.
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Payoff lab
Pick a strategy, then move time, volatility and Nifty. Hover the chart to read P&L at any level; click to set a what-if price.
At expiryBefore expiry (time slider)Expected move (1 SD)▲ bought strike ▲ sold strike
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The strategy library
Every strategy priced on Nifty 23,000 with 30 days to expiry (calendars: 7-day short, 35-day long), 14% IV, one lot of 65. Click "See live payoff" to open it in the lab.
Bullish 4
Long Call
●○○
Nifty will rise, and rise soon.
Buy 23,000 CE (30d) @ 419.2
Net premium: Buy 23,000 CE −419.2 → you pay 419.2 pts (₹27,247)
Breakeven23,419= 23,000 + 419.2
You paid 419.2 points, so Nifty must close 419.2 points above the 23,000 strike just to get that money back.
Max profitUnlimited
No limit: above the breakeven, every point Nifty rises adds ₹65.
Max loss₹27,247= 419.2 pts × 65
If Nifty ends at or below 23,000, the call expires worthless and you lose only the premium you paid.
Budget is next week and you think Nifty breaks out above 23,000. Instead of buying a full futures lot, you buy one 23,000 call.
When to use, risk and adjustments
When: You expect a sharp up-move before expiry and want losses capped at the premium.
Risk: You lose the whole premium if Nifty is at or below 23,000 at expiry. Time decay eats the option every day the move does not come.
Mistake: Buying far OTM weekly calls because they are "cheap". Most of them expire worthless.
Adjust: If Nifty rallies, sell a higher call against it to turn it into a bull call spread and lock part of the gain.
Short (Naked) Put
●●●
Nifty will NOT fall below 22,700.
Sell 22,700 PE (30d) @ 199.6
Net premium: Sell 22,700 PE +199.6 → you receive 199.6 pts (₹12,976)
Breakeven22,500= 22,700 − 199.6
You received 199.6 points, so Nifty can fall up to 199.6 points below 22,700 before you start losing.
Max profit₹12,976= 199.6 pts × 65
If Nifty stays above 22,700, the put expires worthless and you keep all 199.6 points.
Below 22,600 you lose 1 point for every point Nifty falls. So the breakeven is 22,600 minus your best profit (the 200-point upper gap plus the 5.8 credit).
You paid 1,157.7 points. Below 23,000 only one put works, so Nifty must fall the full 1,157.7. Above it two calls work, so a rise of half that is enough.
Max profitUnlimited
No limit: above the upper breakeven every point Nifty rises adds ₹130, because you own two calls.
Max loss₹75,250= 1,157.7 pts × 65
If Nifty ends exactly at 23,000, all three options expire worthless and you lose the full 1,157.7.
You buy two 23,000 calls and one 23,000 put. Up-moves pay double.
When to use, risk and adjustments
When: Event ahead with an upside bias.
Risk: Higher cost than a straddle; loss if Nifty stays flat.
Mistake: Using it without a real bias: a plain straddle is cheaper.
Adjust: Sell one call into a rally to recover cost.
Strip
●●○
Big move expected, more likely down.
Buy 23,000 CE (30d) @ 419.2 Buy 2× 23,000 PE (30d) @ 319.3
Net premium: Buy 23,000 CE −419.2 · Buy 2 × 23,000 PE −638.6 → you pay 1,057.8 pts (₹68,759)
You paid 1,057.8 points. Below 23,000 two puts work, so a fall of half that is enough. Above it only one call works, so Nifty must rise the full 1,057.8.
Max profitUnlimited
No limit: above the breakeven, every point Nifty rises adds ₹65.
Max loss₹68,759= 1,057.8 pts × 65
If Nifty ends exactly at 23,000, all three options expire worthless and you lose the full 1,057.8.
You buy one 23,000 call and two 23,000 puts. Down-moves pay double.
When to use, risk and adjustments
When: Event ahead with a downside bias.
Risk: Higher cost; loss if Nifty stays flat.
Mistake: Ignoring the put skew: puts already cost more.
Adjust: Sell one put into a fall.
Income & hedging 3
Covered Call
●○○
You own Nifty and expect a slow rise or sideways market.
Below 22,700 the bought put stops the loss: the drop from 23,100.4 to 22,700, minus the 79.0 option credit.
Long Nifty futures, buy the 22,700 put, sell the 23,300 call. The call pays for the put.
When to use, risk and adjustments
When: You want insurance and accept capping the upside.
Risk: Upside is capped; loss is limited to the put strike.
Mistake: Collars that are too tight leave no room to make money.
Adjust: Widen the collar when you are more confident.
Calendars & diagonals 4
Call Calendar Spread
●●●
Nifty stays near 23,000 this week; IV stays steady or rises.
Sell 23,000 CE (7d) @ 189.7 Buy 23,000 CE (35d) @ 457.2
Net premium: Sell 23,000 CE +189.7 · Buy 23,000 CE −457.2 → you pay 267.6 pts (₹17,391)
Breakeven22,721 / 23,364
About 22,721 / 23,364. It depends on how much the 35-day call is still worth on the weekly expiry, so it comes from the pricing model, not a simple strike ± premium formula.
Max profit₹8,823= 403.3 − 267.6 = 135.7 pts × 65
Best case is Nifty at 23,000 on the weekly expiry: the weekly call expires worthless while the monthly call is still worth 403.3 points. Minus the 267.6 you paid.
Max loss₹17,391= 267.6 pts × 65
If Nifty moves far away, both calls end up worth almost the same, so you lose about the 267.6 you paid.
Sell this week's 23,000 call (7 days) and buy next month's 23,000 call (35 days).
When to use, risk and adjustments
When: Near-term options decay faster than far-term ones; you profit from that difference.
Risk: Loss if Nifty moves far away from 23,000 or if far-month IV falls.
Mistake: Ignoring the vega of the long leg: an IV crush can hurt even if Nifty pins.
Adjust: After the near expiry, sell the next week's call against the long call again.
Put Calendar Spread
●●●
Nifty stays near 23,000 this week.
Sell 23,000 PE (7d) @ 166.3 Buy 23,000 PE (35d) @ 340.8
Net premium: Sell 23,000 PE +166.3 · Buy 23,000 PE −340.8 → you pay 174.5 pts (₹11,340)
Breakeven22,722 / 23,364
About 22,722 / 23,364. It depends on how much the 35-day put is still worth on the weekly expiry, so it comes from the pricing model.
Max profit₹8,814= 310.1 − 174.5 = 135.6 pts × 65
Best case is Nifty at 23,000 on the weekly expiry: the weekly put expires worthless while the monthly put is still worth 310.1 points. Minus the 174.5 you paid.
Max loss≈ ₹18,772
About ₹18,772. On a rise you lose the debit. On a deep fall a little more, because a deep in-the-money put trades slightly below its intrinsic value (interest effect).
Sell this week's 23,000 put and buy next month's 23,000 put.
When to use, risk and adjustments
When: Same idea with puts; puts often carry more IV, so check both.
Risk: Large moves either way and a fall in far IV.
Mistake: Not checking the term structure: if near IV is lower than far IV, the trade starts at a disadvantage.
Adjust: Re-centre by rolling the short put to the new ATM strike.
Diagonal Call (Poor Man's Covered Call)
●●●
Slowly bullish.
Buy 22,900 CE (35d) @ 512.7 Sell 23,300 CE (7d) @ 73.7
Net premium: Buy 22,900 CE −512.7 · Sell 23,300 CE +73.7 → you pay 439.0 pts (₹28,534)
Breakeven22,966
About 22,966. It depends on the monthly call's value on the weekly expiry, so it comes from the pricing model.
Max profit₹14,062= 655.3 − 439.0 = 216.3 pts × 65
Best case is Nifty at 23,300 on the weekly expiry: the sold weekly call expires worthless and the monthly 22,900 call is worth 655.3 points. Minus the 439.0 you paid.
Max loss₹28,534= 439.0 pts × 65
If Nifty falls far, the monthly call is worth almost nothing, so you lose about the 439.0 you paid.
Buy next month's 22,900 call and sell this week's 23,300 call. Repeat the weekly sale.
When to use, risk and adjustments
When: You want covered-call income without owning a full futures position.
Risk: A big fall loses the debit; a sharp rally above the short strike caps gains.
Mistake: Selling a short call whose strike is below your long call's break-even.
Adjust: Roll the short call each week; roll up if Nifty rallies.
Double Calendar
●●●
Nifty stays between about 22,700 and 23,300 this week.
Sell 22,700 PE (7d) @ 60.1 Buy 22,700 PE (35d) @ 220.6 Sell 23,300 CE (7d) @ 73.7 Buy 23,300 CE (35d) @ 314.6
Net premium: Sell 22,700 PE +60.1 · Buy 22,700 PE −220.6 · Sell 23,300 CE +73.7 · Buy 23,300 CE −314.6 → you pay 401.4 pts (₹26,092)
Breakeven22,623 / 23,500
About 22,623 / 23,500. It depends on how much the two monthly options are still worth on the weekly expiry, so it comes from the pricing model.
Max profit≈ ₹7,688
About ₹7,688, near either sold strike on the weekly expiry: the weekly options expire worthless and the monthly ones keep their time value.
Max loss≈ ₹33,427
About ₹33,427, on a big move either way: the monthly options lose most of their time value.
Put calendar at 22,700 and call calendar at 23,300, both selling the weekly and buying the monthly.
When to use, risk and adjustments
When: A wider tent than a single calendar, positive vega.
Risk: Loss on a large move or a fall in IV.
Mistake: Entering when IV is already very high; a drop in IV hurts the long legs.
Adjust: Close one side if Nifty trends; roll the weekly legs.
Ratio & advanced 5
Call Ratio Spread (1×2)
●●●
Nifty rises slowly to about 23,300, not beyond.
Buy 23,000 CE (30d) @ 419.2 Sell 2× 23,300 CE (30d) @ 278.7
Net premium: Buy 23,000 CE −419.2 · Sell 2 × 23,300 CE +557.3 → you receive 138.2 pts (₹8,980)
At 23,300 you are up the 300-point gap plus the 138.2 credit. Above 23,300 the extra sold call loses 1 point per point, so Nifty can rise that much more before you lose.
At 22,700 you are up the 300-point gap plus the 79.9 credit. Below 22,700 the extra sold put loses 1 point per point, so Nifty can fall that much more before you lose.
At 23,300 you are down the 300-point gap plus the 138.2 you paid. Above 23,300 the extra bought call gains 1 point per point, so Nifty must climb that much more.
Max profitUnlimited
No limit: above the breakeven, every point Nifty rises adds ₹65.
At 22,700 you are down the 300-point gap plus the 79.9 you paid. Below 22,700 the extra bought put gains 1 point per point, so Nifty must fall that much more.
Only a fall can hurt: like a short put, the worst case (Nifty at zero) is 22,700 − 272.6. Above 23,500 you still keep 272.6 − 200, a profit, because the credit is bigger than the call spread.
* Only if Nifty went all the way to 0: a theoretical worst/best case.
You sell the 22,700 put and the 23,300/23,500 call spread. Because the total credit is more than 200 points, a rally cannot lose money.
When to use, risk and adjustments
When: IV is high and the credit received is larger than the call-spread width.
Risk: Downside risk like a short put below the breakeven.
Mistake: Building it when the credit is smaller than the call-spread width: then upside risk returns.
Adjust: Roll the put down and out if Nifty falls.
Synthetics & arbitrage 6
Long Futures
●○○
Nifty rises; the baseline every option strategy is compared to.
Buy Nifty futures @ 23100.4
Net premium: Futures bought at 23,100.4 → you pay 0.0 pts (₹0)
Breakeven23,100= 23,100.4
Futures trade a little above spot (interest minus dividends), so you break even only when Nifty reaches the 23,100.4 you paid.
Max profitUnlimited
No limit: every point Nifty rises adds ₹65.
Max loss₹15,01,527 *= 23,100.4 pts × 65
Every point Nifty falls costs ₹65. The worst case (Nifty at zero) is the full 23,100.4.
* Only if Nifty went all the way to 0: a theoretical worst/best case.
You buy one Nifty futures lot. Every point up makes ₹65, every point down loses ₹65.
When to use, risk and adjustments
When: Directional bet with full participation and full risk.
Risk: Losses grow point for point with no cap. Margin calls on big moves.
Mistake: Over-leveraging: one lot controls about ₹15 lakh of Nifty.
Adjust: Buy a put for protection (protective put) or sell a call for income (covered call).
Synthetic Long
●●○
Same as long futures, built from options.
Buy 23,000 CE (30d) @ 419.2 Sell 23,000 PE (30d) @ 319.3
Net premium: Buy 23,000 CE −419.2 · Sell 23,000 PE +319.3 → you pay 99.9 pts (₹6,492)
Breakeven23,100= 23,000 + 99.9
The call costs 99.9 points more than the put, so Nifty must reach 23,000 + 99.9: the same price as the futures.
Max profitUnlimited
No limit: above the breakeven, every point Nifty rises adds ₹65.
Same number: the result is locked the moment you enter. The only real risks are costs and execution mistakes.
Bull call spread 22,800/23,200 plus bear put spread 23,200/22,800. It always pays 400 points at expiry.
When to use, risk and adjustments
When: An arbitrage or financing trade, used by desks to lend or borrow at an implied rate.
Risk: Practically none in index options, but costs and liquidity matter.
Mistake: Thinking it is free money: the price already reflects interest rates.
Adjust: None; it is held to expiry.
Course contents ·
Module 1 · 14 topics
Foundations
What an option is, in plain words
1What is a derivative?
A derivative is a contract whose value comes from something else, called the underlying. For Nifty options the underlying is the Nifty 50 index. You never buy the index itself; you buy or sell a contract whose price moves because Nifty moves.
The two derivatives you will use every day are futures (an obligation to buy or sell at a fixed price) and options (a right, but not an obligation).
2What is an option?
An option gives the buyer the right, not the obligation, to buy or sell the underlying at a fixed price (the strike) on expiry. The buyer pays a price for this right, called the premium. The seller (writer) receives the premium and takes on the obligation.
Think of it like a token amount for a flat: you pay a small sum to lock the price. If prices rise, you use the right. If they fall, you walk away and lose only the token.
3Call option (CE)
A call is the right to buy. It gains value when Nifty rises. On NSE it is shown as CE.
Nifty 23,000 example
The 30-day 23,000 call costs about 419.2 points. One lot is 65 units, so you pay ₹27,247. If Nifty ends at 23,800, the call is worth 800 points: profit = (800 − 419.2) × 65 = ₹24,753. If Nifty ends below 23,000, the call expires worthless and you lose ₹27,247.
4Put option (PE)
A put is the right to sell. It gains value when Nifty falls. On NSE it is shown as PE.
Nifty 23,000 example
The 30-day 23,000 put costs about 319.3 points (₹20,756 per lot). If Nifty falls to 22,300, the put is worth 700 points: profit = (700 − 319.3) × 65 = ₹24,744.
5The four basic positions
Position
You want Nifty to
Max profit
Max loss
Buy call
Rise
Unlimited
Premium paid
Sell call
Stay below strike
Premium received
Unlimited
Buy put
Fall
Strike − premium (Nifty to 0)
Premium paid
Sell put
Stay above strike
Premium received
Strike − premium
Every strategy on this page is a combination of these four, plus futures. Learn these four payoff shapes by heart.
6Strike price and the Nifty strike ladder
The strike is the fixed price in the contract. Nifty strikes are listed every 50 points (22,950, 23,000, 23,050 …), with the most liquid ones at round 100s near the current level.
The strike nearest to the spot price is called ATM (at the money). With Nifty at 23,000, the 23,000 strike is ATM.
7Expiry: weekly and monthly
Nifty options expire on Tuesday (weekly), and the monthly contract expires on the last Tuesday of the month. NSE moved Nifty expiry from Thursday to Tuesday in September 2025. If Tuesday is a trading holiday, expiry moves to the previous trading day.
Since SEBI's 2024 rules, each exchange offers weekly options on only one benchmark index: Nifty on NSE and Sensex on BSE. Bank Nifty and other NSE indices now have monthly expiries only.
Careful
Exchanges can change expiry days. Always check the latest NSE circular before planning a trade around an expiry date.
8Premium, lot size and contract value
Premium is quoted in index points per unit. You trade in lots: one Nifty lot is 65 units (revised from 75 to 65 for contracts from January 2026, per NSE's circular of 3 October 2025).
Nifty 23,000 example
Rupee premium = points × lot size. A 23,000 call at 419.2 costs 419.2 × 65 = ₹27,247. The contract value (notional) is 23,000 × 65 = ₹14,95,000, which is why a small Nifty move is a big rupee move: every 1 point = ₹65 per lot.
9Moneyness: ITM, ATM, OTM
Call (Nifty 23,000)
Put (Nifty 23,000)
In the money (ITM)
Strike below 23,000 (e.g. 22,700)
Strike above 23,000 (e.g. 23,300)
At the money (ATM)
23,000
23,000
Out of the money (OTM)
Strike above 23,000 (e.g. 23,300)
Strike below 23,000 (e.g. 22,700)
OTM options are cheaper because they need a move to be worth anything at expiry. ITM options behave more like futures.
10Intrinsic value and time value
Premium = intrinsic value + time value (extrinsic). Intrinsic value is what the option would be worth if it expired now. Time value is everything else: the price of possibility.
Nifty 23,000 example
The 22,700 call (30 days) costs 597.9. Intrinsic = 23,000 − 22,700 = 300. Time value = 297.9. The 23,300 call costs 278.7: intrinsic 0, so all of it is time value. At expiry, time value is always zero.
11European style and cash settlement
Nifty options are European style: they can be exercised only at expiry, not before. They are cash settled: no shares change hands. At expiry, ITM options are settled in cash at the final settlement price, and OTM options expire worthless.
Stock options on NSE are also European style but are physically settled: an ITM stock option at expiry means you take or give delivery of the shares, which needs the full cash or shares.
12Exercise and assignment
On expiry, NSE automatically exercises ITM index options. If you sold an option that ends ITM, you are assigned and pay the intrinsic value. You never have to "do" anything for index options; the exchange settles it.
Expert note
Most traders close positions before expiry instead of waiting for settlement, because the last hours carry the highest gamma risk and STT on exercised options is charged on intrinsic value.
13How to read an option chain
An option chain lists every strike in the middle, calls on the left and puts on the right. For each, you see the last price (LTP), change, bid/ask, volume, open interest (OI), change in OI and IV.
Read it in this order: (1) where is ATM, (2) premiums and IV of ATM, (3) where the biggest call OI and put OI sit, (4) which strikes are adding OI today. Try the simulated chain in the next section.
14Bid, ask, spread and liquidity
The bid is the best price a buyer offers; the ask is the best price a seller wants. The gap is the spread, a hidden cost every time you trade. ATM Nifty options usually have very tight spreads; far OTM strikes and far expiries are wider.
Expert note
On a four-leg iron condor you cross four spreads to enter and four to exit. Always use limit orders near the mid price on multi-leg trades.
Module 2 · 10 topics
How options are priced
Black-Scholes, parity, futures and decay
15The six things that move a premium
If this goes up…
Call
Put
Nifty (spot)
Up
Down
Strike
Down
Up
Time to expiry
Up
Up
Implied volatility
Up
Up
Interest rate
Up (slightly)
Down (slightly)
Dividends
Down (slightly)
Up (slightly)
Only one of these is not visible on the screen: implied volatility. That is why professionals talk about "buying vol" or "selling vol" rather than buying options.
16Black-Scholes in plain words
The Black-Scholes model prices an option as the expected payoff at expiry, assuming the underlying moves randomly with a given volatility, discounted to today. You do not need the formula to trade, but you must know what goes in: spot, strike, time, volatility, interest rate and dividends.
Nifty 23,000 example
With Nifty 23,000, 30 days, IV 14%, rate 6.5% and dividend yield 1.2%, the model gives the 23,000 call 419.2 and the put 319.3. Every price on this page comes from the same model, so you can see exactly how each input changes it.
Careful
Real markets are not exactly Black-Scholes: big moves happen more often than the model expects, which is why OTM puts trade at higher IV (the skew).
17Put-call parity
For the same strike and expiry: Call − Put = Forward value − Strike (discounted). A call minus a put behaves exactly like futures. If this relationship breaks, arbitrageurs step in.
Nifty 23,000 example
23,000 call 419.2 − 23,000 put 319.3 = 99.9 points. That is the present value of the futures premium over 23,000. This is why the ATM call costs more than the ATM put even with a flat IV.
18Futures and cost of carry
A Nifty future trades at roughly spot × e(r − q) × t: interest minus the dividend yield, for the time left. This gap is the basis or premium.
Nifty 23,000 example
At 6.5% interest and 1.2% dividend yield, the 30-day fair future is about 23,100, a premium of 100 points. On expiry day the future and spot converge.
Expert note
Options are effectively priced off the future, not the spot. When you calculate ATM, the futures price matters more for monthly options.
19Synthetic positions
From parity: Long call + short put = long future. Long put + short call = short future. Also, long call = long future + long put; long put = short future + long call.
Desks use synthetics to replicate positions cheaply, to arbitrage mispricing, and to understand that every strategy is just a different mix of the same building blocks. Try "Synthetic Long" in the lab: its line is identical to futures.
20Time decay is not a straight line
Time value decays roughly with the square root of time. An ATM option loses value slowly at first and very fast in the final days.
Nifty 23,000 example
ATM 23,000 call: 30 days ≈ 419.2, 14 days ≈ 275.2, 7 days ≈ 189.7, 2 days ≈ 98.4, 1 day ≈ 68.9. Half the time left does not mean half the price; one quarter of the time leaves about half the price.
21Interest rates and dividends
Higher rates raise call prices and lower put prices (the forward goes up). Dividends do the opposite. For a 30-day Nifty option the effect is small but visible in parity. For long-dated options, and for stock options around a big dividend, it matters a lot.
22Why ATM options have the most time value
Time value is largest at the money because that is where the outcome is most uncertain. A deep ITM call is almost a future; a deep OTM call is almost worthless. ATM is the 50-50 point.
Nifty 23,000 example
Time value of 30-day calls: 22,500 = 237.2, 23,000 = 419.2, 23,500 = 205.7.
23Probability of expiring in the money
In the model, the probability that a call ends ITM is N(d2), slightly less than its delta. Traders use delta as a quick proxy: a 0.30 delta call has roughly a 30% chance of finishing ITM.
Careful
These are risk-neutral model probabilities, not forecasts. They assume the IV is the right volatility.
24Arbitrage: conversions, reversals and boxes
A conversion is long future + long put + short call (same strike): a locked payoff. A reversal is the opposite. A box is a bull call spread plus a bear put spread with the same strikes: it always pays the strike gap.
Nifty 23,000 example
The 22,800/23,200 box always pays 400 points at expiry. Its fair cost today is about 397.9 points: the difference is interest. Open "Box Spread" in the lab and you will see a flat line.
Module 3 · 14 topics
The Greeks
Delta, gamma, theta, vega, rho and beyond
25Why Greeks matter
Greeks measure how the option price changes when one input changes. They turn a complicated position into a few numbers you can manage: how much you make per point (delta), how fast that changes (gamma), what time costs you (theta), and what volatility does (vega).
26Delta
Delta is the change in option price for a 1-point move in Nifty. Calls have delta 0 to +1, puts 0 to −1. ATM options are near ±0.5.
Nifty 23,000 example
The 30-day 23,000 call has delta ≈ 0.55. If Nifty rises 100 points, the call gains about 55 points, or ₹3,579 per lot.
27Delta as a hedge ratio
Position delta in "Nifty units" tells you how much futures you would need to be flat. One lot of the ATM call has delta 0.55 × 65 = 35.8 units, about 0.55 of a futures lot.
Expert note
A desk running a delta-neutral book sells about 0.55 futures lots against every long ATM call lot, and rebalances as delta changes.
28Delta as a rough probability
Option sellers often choose strikes by delta: a 0.15 to 0.20 delta short strangle, for example. Delta is roughly the chance of the option finishing ITM. It is a shortcut, not a guarantee.
Nifty 23,000 example
30-day deltas at 14% IV: 23,500 call 0.34, 23,800 call 0.23, 22,500 put -0.25, 22,200 put -0.16.
29Gamma
Gamma is how much delta changes for a 1-point move. Buyers are long gamma (delta moves in their favour), sellers are short gamma (delta moves against them).
Nifty 23,000 example
ATM 30-day gamma ≈ 0.00043. After a 100-point rally, delta rises from 0.55 to about 0.59.
30Gamma near expiry
Gamma of ATM options explodes as expiry approaches. That is why expiry days see wild premium swings: an ATM option can double or go to zero within hours.
Nifty 23,000 example
ATM gamma: 30 days 0.00043, 7 days 0.00089, 1 day 0.00237: about 6× higher on the last day.
Careful
Short straddles on expiry day carry the highest gamma risk on the market. A 1% move late in the day can turn a calm position into a large loss.
31Theta
Theta is the loss in option value per day, all else equal. Buyers pay theta; sellers collect it.
Nifty 23,000 example
The 30-day ATM call loses about 7.8 points a day (₹510 per lot). At 7 days it loses about 14.4 points a day.
32The gamma-theta trade-off
You cannot have both. Long options: positive gamma, negative theta: you pay daily for the chance of a big move. Short options: negative gamma, positive theta: you earn daily but get hurt by big moves. Every options trade is a bet on whether actual movement will beat the movement priced in.
33Vega
Vega is the change in option price for a 1-point change in IV. Longer-dated and ATM options have the most vega.
Nifty 23,000 example
30-day ATM call vega ≈ 26.1 points. If IV jumps from 14% to 17%, the call gains about 78 points (₹5,082 per lot) even if Nifty does not move.
34Rho
Rho is sensitivity to interest rates. It is small for short-dated Nifty options (about 10.1 points per 1% rate change for the 30-day ATM call) and usually ignored for weekly trading, but it matters for long-dated options and box spreads.
35Position (net) Greeks
Add up the Greeks of every leg, multiplied by quantity and direction. That gives your book's total delta, gamma, theta and vega. The payoff lab shows these live for any strategy.
Nifty 23,000 example
A short 23,000 straddle (1 lot each): delta near 0, but a 100-point move shifts delta by about 5.6 Nifty units against you (negative gamma), theta about +₹804 a day, vega about −₹3,388 per vol point.
36Second-order Greeks: vanna, charm, volga
Vanna: how delta changes when IV changes. Matters when IV moves with price (it usually does: IV rises when Nifty falls).
Charm: how delta changes with time. OTM option deltas drift toward zero as expiry nears.
Volga (vomma): how vega changes with IV. Wings (far OTM options) have high volga.
You do not need to compute these, but knowing they exist explains why a "delta-neutral" position drifts overnight.
37Delta-neutral trading and gamma scalping
A delta-neutral trader hedges delta with futures so that profit comes from volatility, not direction. A long-straddle holder can gamma scalp: sell futures when Nifty rises, buy back when it falls, locking small gains that can pay for theta.
Expert note
Gamma scalping makes money only if realized volatility is higher than the IV you paid. It is the cleanest way to see "trading vol" in practice.
38Pin risk
When Nifty closes very near a short strike on expiry, you do not know until settlement whether it ends ITM. Small moves around the strike flip the outcome. Close short ATM positions before the last minutes instead of gambling on the settlement price.
Module 4 · 13 topics
Volatility
IV vs HV, VIX, skew, term structure and the surface
39What volatility means
Volatility is how much Nifty moves, measured as the annualised standard deviation of daily returns. 14% volatility means a typical one-year move of about ±14%, or about ±203 points on a typical day (14% ÷ √252).
40Historical (realized) volatility
HV is calculated from past prices: take daily log returns ln(close/previous close), compute their standard deviation over 10, 20 or 30 days, and multiply by √252.
Nifty 23,000 example
If Nifty's daily returns over the last 20 sessions have a standard deviation of 0.8%, HV = 0.8% × √252 ≈ 12.7%.
41Implied volatility
IV is the volatility number that, put into the pricing model, gives today's market price. It is the market's forecast of future movement, plus a fear premium. When people rush to buy options, IV rises; when they sell, it falls.
42IV vs HV: the volatility risk premium
IV is usually a bit higher than the volatility that actually follows. That gap is the volatility risk premium: option sellers get paid for carrying crash risk. It is why systematic premium selling can work on average, and why it occasionally loses badly.
Situation
Usual idea
IV well above HV
Options are rich: favour selling premium (defined risk)
IV below HV
Options are cheap: favour buying premium
IV low before a known event
Consider long straddle/strangle
43India VIX
India VIX is NSE's volatility index, calculated from Nifty option prices. It is the market's expected annualised volatility for the next 30 days. Low VIX = calm, cheap options. High VIX = fear, expensive options.
Expert note
VIX usually rises when Nifty falls and falls when Nifty rises. Short-premium traders watch VIX spikes; long-premium traders watch for VIX at multi-month lows before events.
44Expected move from IV
One standard deviation move by expiry = spot × IV × √(days/365). About two-thirds of the time, Nifty should end inside this range (if the model were right).
Nifty 23,000 example
At 14% IV: 30-day expected move ≈ ±923 points (22,077 to 23,923). 7-day ≈ ±446 points. The ATM straddle price (739 for 30 days) is a quick market estimate of the same thing.
45IV rank and IV percentile
IV rank = (current IV − 1-year low) ÷ (1-year high − 1-year low). IV percentile = % of days in the past year when IV was lower than today. Both tell you whether today's IV is high or low for Nifty itself, which matters more than the raw number.
Nifty 23,000 example
If India VIX ranged 10 to 22 over a year and is 14 today, IV rank = (14 − 10) ÷ (22 − 10) = 33%.
46Volatility smile and skew
Plot IV across strikes and it is not flat. For Nifty, OTM puts carry higher IV than OTM calls: the skew (or smirk). It reflects demand for crash protection: markets fall faster than they rise.
Nifty 23,000 example
Turn on "Real-world skew" in the lab. The 22,000 put then prices at about 17.4% IV versus 14% ATM, and the 24,000 call at about 11.3%.
47Term structure
IV across expiries is the term structure. Normally, near expiries have lower IV than far ones (upward sloping). Before an event, or in panic, near-term IV jumps above far-term (inverted). Calendar spreads are a bet on this shape.
48The volatility surface
Put skew (across strikes) and term structure (across expiries) together and you get the volatility surface: IV for every strike and every expiry. Desks watch how the surface shifts: a parallel move (all IV up), a skew change (puts bid), or a term change (front month spikes).
Expert note
A JD line like "analyse volatility surfaces" means: know where IV is rich or cheap across strikes and expiries, and build trades that buy the cheap part and sell the rich part.
49Event volatility and IV crush
Before results, budgets, policy meetings or elections, IV rises because a big move is possible. After the event, uncertainty disappears and IV collapses: the IV crush. A buyer can be right on direction and still lose if the move is smaller than the IV priced in.
Nifty 23,000 example
Long 23,000 straddle at 18% IV, 7 days: cost 457 points. Next day IV falls to 12% and Nifty moves 150 points: value ≈ 315 points. The move came; the trade still lost.
50Trading volatility instead of direction
An expert separates two questions: where will Nifty go? and will it move more or less than the options imply? Straddles, strangles, condors and butterflies answer the second question. Calendars and diagonals trade the shape of the term structure.
51Sticky strike vs sticky delta
When Nifty moves, does each strike keep its IV (sticky strike) or does IV move with moneyness (sticky delta)? It changes how your Greeks behave. In falls, Nifty often shows rising IV across the board, which helps long puts and hurts short puts more than delta alone suggests.
Module 5 · 12 topics
Reading Nifty
Trend, indicators, open interest, PCR and max pain
52Trend structure
An uptrend makes higher highs and higher lows; a downtrend makes lower highs and lower lows; a range does neither. Pick strategies to match: directional spreads in trends, condors and butterflies in ranges.
53Support, resistance and round numbers
Nifty often reacts at round numbers (23,000, 23,500) and at previous swing highs and lows. Option writers cluster at these strikes too, which can reinforce them into expiry.
54Moving averages
The 20, 50 and 200-day moving averages show short, medium and long-term trend. Nifty above a rising 50-DMA is a bullish backdrop; below a falling one is bearish. Use them to choose bias, not exact entries.
55RSI and momentum
RSI (14) above 70 is "overbought", below 30 "oversold". In strong trends RSI can stay extreme for weeks. For options, momentum tells you whether to favour debit spreads (strong momentum) or credit spreads (fading momentum).
56VWAP for intraday
VWAP is the volume-weighted average price for the day. Intraday option sellers often treat Nifty above VWAP as bullish and below as bearish, and hedge or adjust when price crosses it decisively.
57ATR and volatility-based sizing
Average True Range measures the typical daily range in points. If Nifty's ATR is 200 points, a strangle with strikes only 150 points away is inside a normal day's move. Use ATR to sanity-check strike distance and stop levels.
58Open interest basics
Open interest is the number of contracts still open. Volume counts trades; OI counts positions. Rising OI means new positions are being opened; falling OI means positions are being closed.
The chain above is simulated for learning: premiums come from the model and OI is a made-up pattern. It is not live NSE data.
59Price and OI: the four combinations
Price
OI
Usual reading
Up
Up
Long build-up (bullish)
Down
Up
Short build-up (bearish)
Up
Down
Short covering (bullish, but weaker)
Down
Down
Long unwinding (bearish, but weaker)
Apply it to Nifty futures, and to individual strikes: rising call OI with falling call price = call writing (resistance).
60Put-call ratio (PCR)
PCR = total put OI ÷ total call OI. Above 1, more puts are open (often put writers, which is supportive). Very high readings can mean the market is overcrowded on one side and can be read as contrarian.
Careful
PCR has no fixed "buy" or "sell" level. Compare it with its own recent range and with price.
61Max pain
Max pain is the strike at which option buyers, in total, would lose the most at expiry (option writers' payout is lowest). Some traders believe Nifty gravitates toward it near expiry. Treat it as a weak, last-day tendency, not a target.
62OI walls as support and resistance
The strike with the highest call OI often acts as resistance and the highest put OI as support, because writers defend them. Watch for shifts: if the biggest put OI moves up from 22,800 to 23,000, writers are becoming more confident.
Careful
Big OI can also be hedges or spread legs, not naked writing. OI walls break on news.
63FII data and rollovers
NSE publishes participant-wise OI (FII, DII, Pro, Client) daily. FII net index futures and option positions show how large players lean. Near monthly expiry, rollover % and the cost of rolling (futures premium) show whether traders are carrying positions forward.
Module 6 · 8 topics
Choosing the right strategy
View × volatility × time: the decision framework
64The strategy matrix
View ↓ / IV →
IV low (cheap)
IV high (rich)
Bullish
Long call, bull call spread
Bull put spread, short put, jade lizard
Bearish
Long put, bear put spread
Bear call spread, short call
Range
Calendar, butterfly
Iron condor, short strangle, iron fly
Big move
Long straddle/strangle
Ratio backspread, reverse iron condor
Pick the row from your market view and the column from IV rank. Then choose strikes and expiry.
65Debit vs credit strategies
Debit: you pay; you need movement in your favour; time works against you; max loss is what you paid. Credit: you receive; you win if nothing much happens; time works for you; losses come from movement.
66Defined vs uncapped risk
Spreads, condors and butterflies have defined risk: the worst case is known on entry. Naked short calls, puts, straddles and strangles have uncapped risk. Uncapped-risk trades need larger margin, strict stops and much smaller size.
67Choosing strikes by delta
A practical rule set: buy options around 0.40 to 0.60 delta for direction; sell options around 0.15 to 0.30 delta for income; place protective wings at 0.05 to 0.10 delta. Delta adjusts automatically for IV and time, unlike a fixed point distance.
68Weekly or monthly?
Weekly options: cheap, fast decay, huge gamma; good for short, precise views and for sellers who can watch the screen. Monthly options: slower decay, more vega, more room to be wrong on timing.
Nifty 23,000 example
ATM call: 7 days 189.7 points, theta 14.4/day. 30 days 419.2 points, theta 7.8/day.
69Probability vs payoff
High-probability trades (far OTM credit spreads) win often but small, and lose rarely but big. Low-probability trades (OTM long options) lose often but small, and win rarely but big. Neither is better; what matters is expected value after costs.
70Expected value of a trade
EV = (probability of win × average win) − (probability of loss × average loss) − costs. A trade with a 70% win rate is still a losing trade if the average loss is more than 2.3 times the average win.
Nifty 23,000 example
Iron condor 22,300/22,500/23,500/23,700: credit about ₹6,703, max loss about ₹6,297. Check its probability of profit in the lab before deciding it is "safe".
71Pre-trade checklist
What is my view, and over what time?
Is IV high or low (IV rank)? Any event before expiry?
Which strategy fits the matrix?
Strikes by delta and by support/resistance.
Max loss in rupees: is it within 1 to 2% of capital?
Breakevens vs expected move.
Exit plan: profit target, stop, and adjustment trigger.
Liquidity and costs of every leg.
Module 7 · 9 topics
Adjustments and trade management
What to do after you enter
72Why adjust, and when not to
An adjustment changes a position after the market moves, to bring risk back inside your plan. A good adjustment reduces risk; a bad one just delays a loss and adds costs. Decide your adjustment trigger before you enter.
73Rolling: up, down and out
Rolling = closing an option and opening another. Up/down changes the strike; out moves to a later expiry. Rolling out usually collects more credit because the new option has more time value.
Nifty 23,000 example
You sold the 22,700 put and Nifty falls to 22,750 with 5 days left. You buy it back and sell the next month's 22,500 put for a credit. You gain time and distance, but you are still short a put.
74Converting a strangle into an iron condor
If a short strangle becomes risky, buy wings: a further OTM call and put. Uncapped risk becomes defined risk. It costs some of the credit, but you sleep at night.
Nifty 23,000 example
Short 23,500 CE + 22,500 PE collects about 346 points. Buying the 23,700 CE and 22,300 PE turns it into an iron condor with a max loss of about ₹6,297.
75Delta hedging with futures
If your position delta drifts beyond your limit, sell or buy Nifty futures to bring it back. One futures lot = 65 delta. A short strangle showing −65 delta after a rally needs one long futures lot to be flat again.
Careful
Hedging with futures stops the bleeding from direction but not from gamma: you will need to re-hedge if the move continues.
76Rolling the untested side
In a strangle or condor, when Nifty moves toward one short strike, the other side (untested) has lost most of its value. Roll it closer to collect fresh credit and reduce delta. Do not roll it past the tested strike (that is an inverted strangle).
77Inverted strangles: a trap
An inverted strangle has the short call strike below the short put strike. It locks in a loss equal to the overlap and only works if the market comes back to the middle. Professionals treat it as a last resort.
78Take profits early
Most professional premium sellers close credit trades at 50 to 60% of the maximum profit. The last part of the profit takes the longest and carries the most gamma risk.
Nifty 23,000 example
An iron condor that collected ₹6,703 can be closed once it is worth half: you keep about ₹3,352 and remove all tail risk.
79Stop-losses on short premium
A common rule: exit a short option if its price reaches 2× (or 1.5×) the credit received, or if Nifty closes beyond the short strike. Combine a premium stop with a price level stop.
80Expiry-day management
On expiry day: close short ATM options early, never leave naked positions near the money in the last hour, watch for sudden IV spikes, and remember the extra 2% ELM charged on short options on expiry day.
Module 8 · 12 topics
Risk management
How professionals stay in the game
81The numbers: most traders lose
SEBI's study published in September 2024 found that 93% of more than 1 crore individual F&O traders lost money between FY22 and FY24. Read every strategy on this page with that in mind: the edge is small and risk control decides who survives.
82Position sizing
Risk 1 to 2% of trading capital per trade, measured as max loss, not margin. For uncapped-risk trades, use your stop-loss amount and a stress move.
83Margin: SPAN, exposure and upfront collection
Option sellers post margin = SPAN (worst-case loss across scenarios) + exposure margin. Option buyers pay the full premium upfront. Since SEBI's 2024 rules, brokers must collect option premium upfront and positions are monitored intraday.
Expert note
Hedged positions need much less margin: a short strangle with bought wings (iron condor) uses a fraction of the naked margin. Buy the hedge legs first so the margin benefit applies.
84Expiry-day margin rules
From SEBI's October 2024 circular: an additional 2% Extreme Loss Margin applies to short index options on expiry day, and the margin benefit for calendar spreads is not available on expiry day for positions expiring that day.
85Gap risk and black swans
Nifty can gap past your stop overnight. On 4 June 2024, election-results day, Nifty fell nearly 6% in one session. A short strangle with no wings could lose many months of income in a day like that.
Nifty 23,000 example
Short 23,500 CE + 22,500 PE (30 days) collects about ₹22,469. A 6% gap down to 21,620 the next day makes the 22,500 put worth about 1,066 points at an elevated IV of 24%: a loss of roughly ₹49,838 per lot.
86Liquidity risk
Far OTM strikes, far expiries and very large orders face wide spreads and slippage. NSE also sets a quantity freeze limit per order; bigger orders must be split. Check the current limit on NSE before scaling up.
87Portfolio Greek limits
Desks set hard limits: max net delta (e.g. ±2 futures lots), max short gamma, max vega, max loss per day. Every trade is checked against the limits before it is placed, not after.
88Scenario analysis and stress tests
Before entering, ask: what happens if Nifty moves ±2%, ±5%, and IV jumps 5 points? Use the scenario buttons in the payoff lab ("Gap down 5%", "VIX spike") to see it in rupees.
89VaR and expected shortfall
Value at Risk answers "what is the loss I should not exceed on 99 days out of 100?". Expected shortfall is the average loss on that 1 bad day. Short-option books have fat tails, so expected shortfall is the more honest number.
90Correlation and concentration
Five Nifty strangles are not five trades: they are one big bet on Nifty staying in a range. Count risk by underlying and by direction, not by number of positions.
91Risk of ruin and the Kelly idea
The Kelly criterion gives the bet size that maximises long-run growth: f = W − (1 − W) ÷ (avg win ÷ avg loss). Professionals use a fraction (¼ to ½ Kelly) because estimates are noisy. Betting more than Kelly reduces growth and raises the risk of ruin.
92Trading psychology
The biggest losses come from behaviour: refusing to take a stop, doubling a losing position, revenge trading after a loss, or over-trading on expiry day. Rules written before the trade are the cure.
Module 9 · 8 topics
Execution and trade logs
Orders, slippage and the numbers that judge you
93Order types
Limit: buy or sell at your price or better. Use it for options almost always.
Market: fills immediately at any price: dangerous in thin strikes.
Stop-loss (SL): becomes a limit order when the trigger is hit.
SL-M: becomes a market order at the trigger. Brokers may restrict it for options.
94Legging in vs basket orders
Placing legs one by one (legging) risks the market moving between fills. Basket or multi-leg orders reduce that. If you must leg in, buy the protective legs first: it reduces margin and avoids being naked even for a minute.
95Slippage and impact cost
Slippage is the difference between the price you expected and the price you got. On a four-leg strategy, 1 point of slippage per leg is 4 points, or ₹260 per lot, each way. Over hundreds of trades this decides whether a backtest's profit survives.
96What a trade log must contain
Date and time · underlying and spot · strategy name · each leg (strike, type, expiry, quantity, price) · IV and India VIX at entry · reason for the trade · max loss and target · Greeks at entry · exit time, price and reason · P&L gross and net of costs · mistakes and lessons.
A clean log is what lets you, a quant or a risk manager find out why you make or lose money.
97Win rate, average win and loss, expectancy
Expectancy per trade = win rate × average win − loss rate × average loss. It is the single number that says whether a strategy is worth trading.
98Profit factor, drawdown, Sharpe and more
Profit factor = gross profit ÷ gross loss. Above 1.5 is good for options.
Max drawdown: the largest peak-to-trough fall in equity. The real test of whether you can survive the strategy.
Sharpe ratio: average return ÷ volatility of returns (annualised). Sortino uses only downside volatility.
Calmar: annual return ÷ max drawdown.
99Daily risk report
End of day: net delta, gamma, theta, vega · margin used vs available · P&L day/month · largest position · stress loss for ±3% and ±5% · positions near their stop. This is the "risk metrics" part of most options-desk jobs.
100Reviewing trades
Every week, sort trades by loss and read the five worst. Were they bad decisions or bad luck within a good process? Change rules only on bad decisions.
Module 10 · 10 topics
Backtesting and automation
Systematic strategies and working with quants
101Systematic vs discretionary
Discretionary: you decide each trade from your reading of the market. Systematic: fixed rules decide entries, exits and size, so the strategy can be tested and automated. Most desks blend both: systematic core, discretionary risk overrides.
102Data you need
Historical option prices for every strike (ideally minute bars with bid/ask), underlying prices, India VIX, expiry calendars and lot-size history (Nifty lots have changed several times: 75 to 65 in January 2026). Wrong lot sizes are a classic silent bug.
103Designing a backtest
Hypothesis (e.g. "IV is rich vs HV on Monday mornings").
Exact entry rule: time, strikes (by delta or points), quantity.
STT (from 1 April 2026): 0.15% of premium on option sales, 0.15% of intrinsic value on exercised options, 0.05% on futures sales. Add exchange transaction charges, SEBI fees, stamp duty (0.003% on option buys), GST at 18% on brokerage and charges, and slippage.
105Biases that fake a profit
Look-ahead bias: using data you would not have had at the time (e.g. the day's close to decide a 9:20 entry).
Survivorship bias: testing only stocks that still exist.
Overfitting: tuning so many parameters that the strategy fits noise.
Data snooping: testing 100 ideas and reporting the best.
106Out-of-sample and walk-forward testing
Build rules on one period (in-sample), then test them untouched on a later period (out-of-sample). Walk-forward repeats this in rolling windows. If performance collapses out of sample, the edge was probably noise.
107Worked example: a timed short straddle (rules only)
ENTRY 09:20 every trading day
LEGS sell ATM CE + ATM PE, nearest weekly expiry, 1 lot each
STOP each leg: exit if price ≥ 1.25 × entry price (stop-loss per leg)
EXIT 15:15 square off everything
SIZE max loss per day ≤ 1% of capital
COSTS STT 0.15% on sold premium + charges + 1 pt slippage per leg
REPORT expectancy, profit factor, max drawdown, worst day, by VIX bucket
This is a template for how to specify a rule set, not a recommendation. Such strategies are crowded, and their results depend heavily on costs and the volatility regime.
108Monte Carlo and robustness
Shuffle the order of historical trades thousands of times to see the range of drawdowns you could have faced. Vary each parameter a little: a robust strategy degrades gently; a fragile one falls off a cliff.
109Automating: APIs, OMS and kill switches
Automated options trading uses a broker API to place orders, an order management layer to track fills and legs, and risk checks before every order. Must-haves: a kill switch, max-order and max-loss limits, full logging, and alerts when a leg fails to fill.
Careful
SEBI's February 2025 circular sets a framework for retail algo trading through broker APIs (registered algos, order tagging, access controls). Check the current implementation status and your broker's rules before running any automation.
110Working with quants and developers
Write strategies as precise specs: inputs, rules, edge cases (holidays, missing quotes, partial fills), and expected outputs. Agree on one source of truth for prices and Greeks. Review logs together every week.
Module 11 · 8 topics
SEBI rules, costs and tax
What changed and what it costs
111Contract size and lot size
SEBI's October 2024 circular set the minimum contract value for new index derivatives at ₹15 lakh. Exchanges revise lot sizes periodically to stay in range. The Nifty lot is 65 for contracts from January 2026 (NSE circular, 3 October 2025). At Nifty 23,000, one lot = ₹14,95,000.
112One weekly expiry per exchange
Since November 2024, each exchange may offer weekly options on only one benchmark index. NSE chose Nifty 50 (now expiring on Tuesday); BSE chose Sensex (Thursday).
113Upfront premium and intraday monitoring
Brokers must collect option premium upfront from buyers (no leverage on buying options), and exchanges monitor position limits intraday, not just at end of day. Both rules came from the same October 2024 SEBI package.
114Securities Transaction Tax (STT)
Trade
STT from 1 Apr 2026
Sell option
0.15% of premium
Option exercised (ITM at expiry)
0.15% of intrinsic value
Sell futures
0.05% of contract value
Nifty 23,000 example
Selling one lot of the 23,000 call at 419.2: premium ₹27,247, STT ≈ ₹41.
115Other charges
Exchange transaction charges (on premium for options), SEBI turnover fees, stamp duty (0.003% on option buys), brokerage, and 18% GST on brokerage plus exchange and SEBI charges. Check your broker's contract note for exact rates: they change.
116How F&O profits are taxed (overview)
In India, F&O trading income is generally treated as non-speculative business income, taxed at your slab rate, and reported in ITR-3. Business losses can be carried forward (for up to 8 years) against business income. Turnover for options is computed differently from the premium value, and a tax audit may apply depending on turnover and results.
Careful
This is an overview, not tax advice. Rules and thresholds change; confirm with a chartered accountant.
117Stock options: physical settlement
Stock options and futures are physically settled at expiry. An ITM long call means you buy the shares; an ITM short put means you must buy them too. Brokers often square off or raise margins in the last days of the expiry week.
118Tips, finfluencers and SEBI registration
Only SEBI-registered investment advisers and research analysts may give personalised recommendations. Be wary of paid "sure-shot" option tips and of anyone promising fixed returns from options.
Module 12 · 6 topics
US vs Indian derivatives
What changes when you cross markets
119Contract size
US equity and index options use a multiplier of 100 (one SPY option = 100 shares). Nifty uses a lot of 65. US contracts are therefore much smaller in notional value, which makes sizing more granular.
120American vs European exercise
US single-stock and ETF options (e.g. SPY) are American style: they can be exercised any day, so early assignment is a real risk around dividends. SPX and Nifty index options are European style and cash settled.
121Expiry frequency
SPX has options expiring every weekday, which made "0DTE" (zero days to expiry) trading huge. In India, weekly expiries are limited to one benchmark index per exchange since November 2024.
122Settlement details
Some SPX options settle on the opening print (AM-settled), others on the close (PM-settled): a classic trap. Nifty options settle on the closing price of the index on expiry day.
123Margin systems
US brokers use Reg T margin or risk-based portfolio margin; India uses SPAN plus exposure margin with peak-margin and upfront-collection rules. The idea is the same: margin follows the worst-case loss.
124Liquidity and hours
US index options trade with extended hours on some products; NSE options trade 9:15 to 15:30 IST. Nifty weekly options are among the most traded derivative contracts in the world by number of contracts.
Module 13 · 7 topics
The expert playbook
Routines, rules and a 30-day plan
125A daily routine
Pre-market: global cues, GIFT Nifty, events calendar, India VIX.
Open: let the first 15 minutes settle; note OI shifts at key strikes.
Positions: check Greeks and distance to stops.
Close: update the trade log and the daily risk report.
126A weekly routine
Monday: plan the week's expiry trades from IV rank and events. Mid-week: adjust, take profits at targets. Expiry (Tuesday): reduce short gamma early. Weekend: review the five worst trades and the week's metrics.
127Where an edge comes from
Volatility edge: selling IV that is rich vs expected movement, buying it when cheap.
Structure edge: picking the cheapest structure for a view (skew, term structure).
Process edge: sizing, costs and discipline that others skip.
128Explaining options to non-technical people
Use analogies: a call is a token amount to lock a price; a put is insurance; selling options is being the insurance company. Show one picture: the payoff chart. Talk in rupees, not Greeks: "if Nifty falls 500 points, we lose about ₹X".
129Myths to unlearn
"Option selling is safe income": it has small, frequent gains and rare, large losses.
"Cheap OTM options are low risk": you lose 100% of the premium most of the time.
"Max pain decides expiry": at best a weak tendency.
"High PCR means buy": context matters.
130Ten rules experts follow
Know your max loss in rupees before every trade.
Risk 1 to 2% per trade.
Trade volatility, not just direction.
Prefer defined risk.
Respect events.
Take profits on short premium early.
Use limit orders.
Hedge legs first.
Log every trade.
Change rules only from data.
131Your 30-day practice plan
Week 1: payoffs. Rebuild 10 strategies in the lab without looking; predict their shapes first. Week 2: Greeks. Paper-trade one long straddle and one iron condor; record Greeks daily. Week 3: volatility. Track India VIX and ATM IV every day; compare with realized moves. Week 4: a full trade log for 10 paper trades with metrics. Only then think about real money, in small size.
For your options desk interview
25 interview questions, answered
Built from a real options-expert job description: spreads, straddles, condors, Greeks, IV vs HV, volatility surfaces, Nifty OI, backtesting, trade logs, automation, SEBI rules and US vs India markets.
Walk me through a bull call spread on Nifty at 23,000.
Buy the 23,000 CE and sell the 23,400 CE, same expiry. With 30 days and 14% IV, the debit is about 179.0 points (₹11,634 per lot). Max loss is the debit, max profit is 400 minus the debit, breakeven is 23,000 plus the debit. I would use it when I am bullish with a target near 23,400 and IV is not cheap enough to justify a naked call.
What is the difference between a straddle and a strangle?
A straddle buys or sells the call and put at the same (usually ATM) strike; a strangle uses an OTM call and an OTM put. A strangle is cheaper to buy and has wider breakevens; sold, it collects less premium but gives more room.
Explain gamma risk on expiry day.
ATM gamma rises sharply as expiry approaches, so a short ATM option's delta can swing from near 0 to near −1 on a small move. A short straddle can go from comfortable profit to a large loss within an hour. I cut short gamma before the last hours, keep wings on, and size down on expiry day.
How do you compare implied and historical volatility?
I compare ATM IV (or India VIX) with 10/20/30-day realized volatility and look at IV rank. IV well above realized suggests options are rich and favours selling defined-risk premium; IV below realized favours buying. I also check whether an event explains the gap.
Why do Nifty OTM puts trade at a higher IV than OTM calls?
Demand for crash protection and the fact that markets tend to fall faster than they rise. Investors pay up for puts, so the volatility surface has a negative skew.
What is a volatility surface and how would you use it?
IV across strikes (skew) and expiries (term structure). I look for parts that are rich or cheap relative to history and to each other, e.g. sell rich front-month IV and buy cheaper back-month IV in a calendar, or use a put ratio when the skew is steep.
How would you hedge a short strangle that is being tested on the upside?
Options: buy a further OTM call to cap the risk; roll the put (untested side) up for more credit to reduce delta; hedge delta with a long futures lot; or close the call if the stop rule is hit. The choice depends on the remaining time, IV, and my rules written before entry.
What is your maximum loss on an iron condor?
The wider wing width minus the net credit, times the lot size. For 22,300/22,500/23,500/23,700 with a credit of about 103 points, the max loss is about 97 points, or ₹6,297 per lot.
Naked call vs covered call: what is the difference?
A naked call has unlimited upside risk because nothing offsets it. A covered call is backed by a long position (shares or futures), so a rally loses on the call but gains on the holding: the upside is capped, not the risk removed.
How do you read open interest?
Combine price and OI: price up + OI up is long build-up, price down + OI up is short build-up, price up + OI down is short covering, price down + OI down is long unwinding. On strikes, I watch where call and put OI concentrate and how it shifts during the day.
What is PCR, and is a high PCR bullish?
Put-call ratio = put OI ÷ call OI. A rising PCR often reflects put writing, which is supportive, but extreme readings can be contrarian. I read it against its own range and price action, never alone.
Explain put-call parity and one arbitrage it creates.
Call − put = PV(forward − strike). If the call is too expensive relative to the put and futures, sell the call, buy the put and buy futures (a reversal/conversion) to lock the mispricing, net of costs.
How would you backtest an iron condor strategy?
Define entry (day, time, delta of short strikes, wing width), exits (profit target, stop, time), and costs (STT 0.15% on sales, charges, slippage). Use historical option prices, not modelled ones, check in-sample and out-of-sample periods, and report expectancy, max drawdown and worst month by VIX regime.
What goes into your trade log?
Time, spot, IV/VIX, strategy, every leg with price, reason, max loss, target, Greeks at entry, exit and reason, gross and net P&L, and a short review. It feeds performance metrics and risk reports.
Which performance metrics matter most to you?
Expectancy after costs, max drawdown, profit factor and Sharpe, plus the worst day and worst month, because short-option strategies hide their risk in the tails.
What changed in SEBI's 2024 F&O rules?
Higher minimum contract size (₹15 lakh), one weekly index expiry per exchange, upfront premium collection from buyers, an extra 2% ELM on short options on expiry day, no calendar-spread margin benefit on expiry day, and intraday monitoring of position limits.
How would you explain an option to a non-technical person?
A call is like paying a token amount to lock the price of a flat: if prices rise you use the deal, if not you lose only the token. Selling options is like running an insurance company: you collect small premiums and occasionally pay a big claim.
How do you size an options trade?
From maximum loss, not margin: risk 1 to 2% of capital per trade. For uncapped risk I use the stop-loss amount plus a stress scenario, and I check total portfolio delta, gamma and vega limits.
When would you buy a straddle?
When I expect realized volatility to beat implied: IV is low relative to its history and an event or a breakout is near. Not after IV has already spiked into the event.
What is a calendar spread's main risk?
A big move away from the strike and a fall in the far-month IV (the long leg has more vega). It profits from time decay of the near leg and stable or rising IV.
What happens to delta as expiry approaches?
ITM options move toward ±1, OTM options toward 0, and ATM options become very sensitive (high gamma), flipping between the two with small moves.
How would you automate an options strategy safely?
A clear spec, broker API with order tagging, pre-trade risk checks (max loss, max lots, delta limits), handling of partial fills and rejections, a kill switch, full logs and alerts, and paper trading before live, within SEBI's algo framework and broker rules.
How are Indian and US options different?
Lot 65 vs multiplier 100, European cash-settled Nifty vs American-style US stock options, daily SPX expiries vs one weekly index per exchange in India, and SPAN-based margin vs Reg T/portfolio margin.
VIX is at 20 versus 11. What changes in your trades?
At 20, premiums are rich: I lean toward defined-risk premium selling with wider strikes and smaller size because moves are also bigger. At 11, options are cheap: I prefer debit spreads, long calendars or long straddles before events, and avoid selling thin premium.
What is a jade lizard?
A short OTM put plus a short OTM call spread, where the total credit exceeds the call-spread width, so there is no upside risk. The risk is on the downside, like a short put.
Test yourself
Final quiz: 20 questions
Answers and reasons appear after you submit.
Common questions
Is this course free?
Yes. Every module, the payoff lab and the quiz are free, with no sign-up. Your progress is saved only in your own browser.
Are the option prices real market prices?
No. Prices come from the Black-Scholes model with Nifty at 23,000, 14% IV, a 6.5% interest rate and a 1.2% dividend yield, so every example is consistent. Live premiums differ; the shapes, Greeks and logic are the same.
What is the Nifty lot size used here?
65 units, the Nifty lot size for contracts from January 2026 (NSE circular of 3 October 2025). Change the lots in the lab to scale any strategy.
Is this investment advice?
No. This is education. CVCrisp is not a SEBI-registered investment adviser or research analyst, and nothing here is a recommendation to trade. SEBI's 2024 study found that 93% of individual F&O traders lost money between FY22 and FY24.
Education only, not investment advice. CVCrisp is not registered with SEBI as an investment adviser or research analyst. Prices on this page come from a model (Nifty 23,000, IV 14%, r 6.5%, dividend yield 1.2%), not from the market; the option chain's open interest is simulated. Lot size, expiry days, margins and taxes change: check NSE, SEBI and your broker before trading. Options can lose money quickly; SEBI's 2024 study found 93% of individual F&O traders made losses over FY22 to FY24.