Vertical spreads (India)

🎯 In 30 seconds: A vertical spread is two options of the same type (both calls or both puts) with the same expiry and different strikes. You buy one and sell the other. That caps both profit and loss, and you know both numbers before you trade. Bull call and bear put spreads cost money up front (debit). Bull put and bear call spreads pay you up front (credit). In India a hedged short option usually needs far less margin than a naked one, because SPAN looks at the whole position, but exposure margin on the short leg still applies. And on stock options, physical settlement can turn a small spread into a full-lot delivery.

Why spreads exist

Buying a single option is simple, but you pay for all of its time value, and if the market does not move fast enough it decays to nothing (see What an option is worth). Selling a single option collects time value, but the loss can be huge and the margin is large.

A spread is a middle path. The option you sell pays for part of the option you buy. In exchange you give up profit beyond the second strike. The result is a trade with a ceiling and a floor.

A cricket comparison helps. A batter who swings at everything can hit sixes or get out first ball. A batter who only plays inside a set range will not score a century in ten overs, but will not lose the wicket to a wild shot either. A spread is the second batter.

The name "vertical" comes from the option chain: the two strikes sit one above the other in the same expiry. The width is the gap between the strikes.

The option prices used in this chapter

One hypothetical Nifty 50 level of 25,000 and one hypothetical chain expiring in 14 days. The prices come from a Black-Scholes model at 13% volatility and are consistent with each other, but they are not real quotes. Real trades fill somewhere between the bid and the ask.

One lot of Nifty options is 65 units for contracts from January 2026 (NSE circular, 3 October 2025). NSE revises lot sizes periodically, so check the current lot before you trade. Every rupee figure below is points x 65.

Strike	Call	Put	Call delta
24,600	547	85	0.77
24,800	405	143	0.66
25,000	286	224	0.54
25,200	192	329	0.42
25,400	122	459	0.30

1. Bull call spread (debit): you think the Nifty goes up

Buy the 25,000 call for 286 and sell the 25,200 call for 192. You pay a net debit of 94 points, or ₹6,110 per lot.

Max loss = debit = ₹6,110, if the Nifty is at or below 25,000 at expiry. Both calls expire worthless.
Max profit = (width - debit) x lot = (200 - 94) x 65 = ₹6,890, at or above 25,200.
Breakeven = lower strike + debit = 25,094.

2. Bear put spread (debit): you think the Nifty goes down

Buy the 25,000 put for 224 and sell the 24,800 put for 143. Net debit 81 points, or ₹5,265.

Max loss = debit = ₹5,265, at or above 25,000.
Max profit = (200 - 81) x 65 = ₹7,735, at or below 24,800.
Breakeven = higher strike - debit = 24,919.

Profit and loss in rupees for one lot at expiry, before charges. Each debit spread risks only what you paid and earns at most the width minus the debit. Nifty level and premiums are hypothetical.

3. Bull put spread (credit): you think the Nifty stays up

Sell the 24,800 put for 143 and buy the 24,600 put for 85. You receive a net credit of 58 points, or ₹3,770.

Max profit = credit = ₹3,770, at or above 24,800. Both puts expire worthless.
Max loss = (width - credit) x lot = (200 - 58) x 65 = ₹9,230, at or below 24,600.
Breakeven = short strike - credit = 24,742.

4. Bear call spread (credit): you think the Nifty stays down

Sell the 25,200 call for 192 and buy the 25,400 call for 122. Net credit 70 points, or ₹4,550.

Max profit = credit = ₹4,550, at or below 25,200.
Max loss = (200 - 70) x 65 = ₹8,450, at or above 25,400.
Breakeven = short strike + credit = 25,270.

Credit spreads flip the shape: you keep the credit if the Nifty stays on the right side of the short strike, and lose at most the width minus the credit. Both lines are flat in the middle, where the trade wins.

Spread	View	Pay or get paid	Max profit	Max loss	Breakeven
Bull call	Up	Debit	Width - debit	Debit	Lower strike + debit
Bear put	Down	Debit	Width - debit	Debit	Higher strike - debit
Bull put	Not down	Credit	Credit	Width - credit	Short (higher) strike - credit
Bear call	Not up	Credit	Credit	Width - credit	Short (lower) strike + credit

Multiply points by the lot size for rupees. A quick self-check: max profit + max loss always equals width x lot. For the bull call: ₹6,890 + ₹6,110 = ₹13,000 = 200 x 65. If your numbers do not add up, something is wrong.

Margin: the benefit for hedged positions

This is where Indian spreads differ most from single options. NSE Clearing margins F&O positions with SPAN, a portfolio system. It runs a set of price and volatility scenarios over your whole position and asks for the worst one-day loss. Then it adds an extreme loss margin (ELM), which for short index options is 2% of notional value, per NSE's margin page (October 2026).

For a naked short 25,200 call, the worst scenario is a sharp rally, and the SPAN figure is large. For the bear call spread, the long 25,400 call caps the loss, so the scenario loss cannot be more than the spread's maximum loss of ₹8,450. The SPAN part therefore drops sharply. This is the "hedge benefit" or "margin benefit" brokers advertise.

The ELM part does not shrink. NSE charges ELM on short options only, on the notional value of the underlying, so the long leg does not reduce it. On a 25,000 Nifty that is 2% x 25,000 x 65 = ₹32,500 for the short leg, on top of SPAN. So the total blocked for a credit spread is often several times its maximum loss, though still far less than for the naked short call. Your broker's margin calculator shows the live figure.

Expiry day adds more

Since 20 November 2024, SEBI requires an additional ELM of 2% on short index options on their expiry day, for positions open at the start of the day and for short positions opened that day (SEBI circular, 1 October 2024). For our spread that is another ₹32,500 on expiry day. Brokers block it in the morning. If your account does not have it, expect a margin shortfall or a forced exit.

Two more Indian rules matter for spreads:

Upfront premium. Since 1 February 2025, brokers must collect net option premium payable upfront from buyers. For a debit spread, the net debit is blocked before you trade.
Order of legs. If you place the short leg first, the system sees a naked short for a moment and asks for the full naked margin. Many traders buy the protective leg first, or use their broker's basket or spread order so both legs go together. Ask your broker how it handles this.

Practical tip

Enter both legs as close together as you can, at a net price you have worked out in advance. Legging in one option at a time leaves you exposed if the Nifty moves between the two fills. If the broker has no combined order, decide your limit price for each leg before you start.

Choosing the width and the strikes

Wider spreads risk more and can earn more. Two bull call spreads on the same chain:

Spread	Debit (points)	Max loss	Max profit	Breakeven
Buy 25,000 / sell 25,200	94	₹6,110	₹6,890	25,094
Buy 25,000 / sell 25,400	164	₹10,660	₹15,340	25,164

The wider spread has a better payoff ratio but needs a bigger move. Neither is "better". Pick the short strike where you think the move will run out, and the width that keeps the maximum loss inside your risk limit (see Position sizing).

Credit spreads have a different trade-off. The bull put spread wins ₹3,770 and risks ₹9,230. It looks like a poor deal, but it also wins more often, because the Nifty only has to stay above 24,800. If options are fairly priced, the higher chance of winning and the smaller payout roughly cancel out. A high win rate is not an edge by itself. See Risk/reward and expectancy.

Stock spreads and the physical settlement trap

Index options are cash settled, so at expiry a Nifty spread simply turns into a rupee credit or debit. Stock options are physically settled, and that creates a trap the US guides do not warn about.

Say you buy a bull call spread on Sharma Foods Ltd: long the 1,000 call, short the 1,040 call, one lot of 500 shares. On expiry day the share settles at ₹1,020. The 1,000 call is in the money and is exercised automatically. The 1,040 call is out of the money and expires. You now have to buy 500 shares at ₹1,000 = ₹5,00,000. A trade that risked a few thousand rupees has turned into a five-lakh delivery obligation, and delivery margins will have been building through the week before expiry.

The same happens with a bear put spread that ends between strikes: you must deliver the shares. If both legs end in the money, the deliveries offset and you receive or pay the difference. The simple rule: close stock spreads before expiry day unless you are ready for delivery. Brokers often have their own physical settlement policies and may close such positions for you.

What else can go wrong

Expiry close near a strike. With cash-settled Nifty options, the final settlement price decides everything. If the Nifty finishes a few points either side of your short strike, the difference between a full win and a partial loss comes down to that price. SEBI changed how expiry settlement prices are worked out in 2026, so read Exercise, assignment and expiry day in India for the current method.
Liquidity. Near-the-money Nifty strikes in the nearest weekly expiry are usually active. Far strikes, far expiries and most stock options can have wide bid-ask gaps. A spread has two legs, so you pay the gap twice.
Gap moves. Overnight news (US markets, global cues, a policy surprise) can open the Nifty beyond both strikes at 9:15 IST. Your loss is still capped at the maximum, but you reach it in one tick.
Costs. Two legs means two sets of brokerage, exchange charges and GST, and STT of 0.15% of premium on every option sale from 1 April 2026. On a 58-point credit spread, costs are a visible share of the profit. See What trading really costs in India.

Common mistake

Holding a spread into the last hour of expiry day to squeeze out the final few points. Most of the profit usually arrives before then, the expiry-day ELM raises your margin, and the closing minutes are the most volatile of the week. Many traders close spreads once they have captured a set share of the maximum profit, or the day before expiry.

Try it

Open the NSE option chain for the Nifty and pick the nearest weekly expiry. Using the mid point of the bid and ask, build one spread of each of the four types with 200-point widths around the current level. For each, write in your trading journal:

Debit or credit, in points and in rupees for one lot.
Max profit, max loss and breakeven, and the self-check (max profit + max loss = width x lot).
The margin your broker's calculator shows for the credit spreads, compared with the naked short leg alone. How much of it is exposure margin?
On expiry day, the actual result of each spread from the NSE settlement price.

Check yourself

What is a vertical spread? Answer: Two options of the same type with the same expiry and different strikes. You buy one and sell the other.
You buy the 25,000 call for 286 and sell the 25,200 call for 192 on a 65-unit lot. What are the maximum loss, maximum profit and breakeven? Answer: Maximum loss ₹6,110 (94 x 65), maximum profit ₹6,890 (106 x 65), breakeven 25,094.
Why does a bear call spread need less margin than the naked short call? Answer: SPAN looks at the whole position, and the long call caps the worst-case loss. Exposure margin on the short leg still applies.
Your Sharma Foods 1,000/1,040 bull call spread ends with the share at ₹1,020. What happens? Answer: The long 1,000 call is exercised and the short 1,040 call expires, so you must take delivery of the full lot at ₹1,000 a share.
What extra margin applies to the short leg of a Nifty spread on expiry day? Answer: An additional 2% extreme loss margin on short index options expiring that day, in force since 20 November 2024.

🪜 Vertical spreads: bull and bear, debit and credit