Collar Options Strategy on Nifty Stocks: Floor, Ceiling and Payoff Explained

A collar options strategy on Nifty stocks lets you hold on to a stock you like, put a floor under it, and pay for that floor by giving up some of the upside. You buy a put below the current price and sell a call above it, and the two premiums mostly cancel each other out. In this guide we take the collar apart leg by leg, run a full worked example on one lot of a stock, show how a Nifty index collar can hedge a portfolio, and cover physical settlement, strike choice and the ways a collar can let you down. If options are new to you, read our options trading for beginners in India guide first.

Educational content only. Not investment advice. All prices and premiums in the worked examples are hypothetical and chosen to keep the arithmetic easy to follow.

What is a collar options strategy?

A collar is a hedge on a stock you already own. Investopedia describes it as buying an out-of-the-money put to protect against a fall and selling an out-of-the-money call to cover the cost of that protection. You’ll also hear it called a hedge wrapper or a risk-reversal. Strip away the jargon and a collar is just a protective put and a covered call on the same shares at the same time.

The name comes from what the two options do to the share price. The put strike becomes a floor and the call strike becomes a ceiling, so your position’s value is held between the two strikes until expiry, the way a collar sits around a neck. Below the floor, the put’s gains make up for losses on the shares. Above the ceiling, the short call’s losses cancel out gains on the shares.

According to Investopedia, investors usually reach for a collar when a stock has already run well above their purchase price, they still like the company for the long haul, and they’re worried about a short-term fall. That’s the heart of it: protecting a gain you’ve already made without selling the shares.

The three legs of a collar

• Long stock: shares in your demat account. To be fully hedged you need at least one full lot of shares for each put you buy and each call you sell.
• Long put (the floor): usually out of the money, meaning the strike is below the current share price. You pay a premium for it.
• Short call (the ceiling): usually out of the money, meaning the strike is above the current share price. You receive a premium for it.

Depending on the two premiums, a collar can start as a small net credit (the call brings in more than the put costs), a small net debit (the put costs more), or close to zero. When the two premiums match, people often call it a zero-cost collar. Don’t take “zero cost” too literally, because it only refers to the premiums. You still pay brokerage and statutory charges, and you still give up everything above the call strike.

Stock options in India trade in lots, and every stock has its own lot size. For the October, November and December 2026 contracts, NSE’s F&O market lots file lists 500 shares per lot for Reliance Industries, 650 for HDFC Bank and 400 for Infosys, and 65 units per lot for Nifty 50 index options. These get revised from time to time, so check the current file before you size a hedge.

Worked example: a collar on one lot of a stock

Say you own 500 shares of a hypothetical Nifty 50 company, Stock ABC, with a lot size of 500. You bought at ₹1,200 and it now trades at ₹1,500, so you’re sitting on a gain of ₹300 a share, or ₹1,50,000 on the lot. You want to stay invested through the next monthly expiry, but you’d hate to hand back most of that gain if the market drops.

You set up the collar with the same expiry on both options:

• Buy one lot of the 1,400 put at a premium of ₹22.
• Sell one lot of the 1,600 call at a premium of ₹25.

That’s a net credit of ₹3 a share (₹25 received minus ₹22 paid), or ₹1,500 on 500 shares. Measured from today’s ₹1,500 price, here’s how things look at expiry:

• Floor: below ₹1,400 the put gains one rupee for every rupee the stock loses. Your effective exit price cannot go below ₹1,403 (the put strike plus the ₹3 credit).
• Maximum loss: ₹1,500 minus ₹1,403, which is ₹97 a share, or ₹48,500 on the lot. That is about 6.5% of today’s position value of ₹7,50,000.
• Ceiling: above ₹1,600 the short call loses one rupee for every rupee the stock gains. Your effective exit price cannot go above ₹1,603.
• Maximum gain: ₹1,603 minus ₹1,500, which is ₹103 a share, or ₹51,500 on the lot.
• Breakeven: ₹1,497, which is today’s price minus the ₹3 credit.

Remember you bought at ₹1,200. So even the worst case leaves you ₹203 a share above cost (₹1,403 minus ₹1,200), or ₹1,01,500 on the lot. For this expiry, the collar has locked in roughly two-thirds of the gain you already had.

Payoff table at expiry

The table puts the collar next to simply holding the 500 shares with no hedge. Profit and loss are measured from today’s ₹1,500 price, before costs.

Read it from the middle outwards. Between the two strikes, the collar behaves almost exactly like the shares, plus the small ₹1,500 credit. Outside them, the result freezes: the loss stops at ₹48,500 no matter how far the stock falls, and the gain stops at ₹51,500 no matter how far it rises. At ₹1,250 the unhedged holder is down ₹1,25,000 while the collar holder is down ₹48,500. At ₹1,750 it flips the other way.

A collar does not make a stock safer to own. It swaps an open-ended range of outcomes for a fixed band, and you agree in advance what you will give up at the top to protect the bottom.

A debit collar with a tighter floor

Now suppose you want a higher floor, so you pick the 1,450 put instead at a hypothetical premium of ₹40 and still sell the 1,600 call at ₹25. The collar now costs a net debit of ₹15 a share, or ₹7,500 on the lot. Here’s what changes:

• Effective floor: ₹1,435 (₹1,450 minus the ₹15 debit), so the maximum loss is ₹65 a share, or ₹32,500.
• Effective ceiling: ₹1,585 (₹1,600 minus ₹15), so the maximum gain is ₹85 a share, or ₹42,500.
• Breakeven: ₹1,515, which is today’s price plus the ₹15 debit.

The tighter floor cut the worst case by ₹16,000. It also trimmed the best case by ₹9,000 and pushed breakeven above today’s price. Every collar comes down to this trade-off: the more protection you buy, the less upside you keep.

Collar formulas in one place

Measuring from the price at which you start the hedge, and writing the net premium as a credit (positive) or a debit (negative):

• Maximum gain = call strike minus starting price plus net premium.
• Maximum loss = starting price minus put strike minus net premium.
• Breakeven = starting price minus net premium.

Run the first example through these and you get a maximum gain of 1,600 minus 1,500 plus 3, which is ₹103, a maximum loss of 1,500 minus 1,400 minus 3, which is ₹97, and a breakeven of ₹1,497. Those match the table. If you’d rather measure from your original purchase price, swap the starting price for your cost; that’s how Investopedia sets out the formulas.

A Nifty index collar for a portfolio

The same idea works for a portfolio that closely tracks the Nifty 50, like a Nifty index fund or ETF. You just use Nifty index options instead of stock options. NSE’s lots file puts one Nifty lot at 65 units of the index, so one lot’s exposure is 65 times the index level.

Take a hypothetical index level of 23,000. One lot then covers 65 × 23,000, or ₹14,95,000 of exposure. An investor with roughly that much in a Nifty index fund could:

• Buy one lot of the 22,000 put at a hypothetical 180 points.
• Sell one lot of the 24,000 call at a hypothetical 150 points.

The net debit is 30 points, or ₹1,950 (30 × 65). Say the index falls to 21,000 at expiry. A portfolio that tracks it exactly loses 2,000 / 23,000 of its value, or ₹1,30,000. The put pays (22,000 minus 21,000) × 65, which is ₹65,000. After the ₹1,950 debit, the net loss is ₹66,950, and that’s also the most you can lose on any fall below 22,000. Now say the index rises to 25,000 instead. The portfolio gains ₹1,30,000, the short call costs (25,000 minus 24,000) × 65, or ₹65,000, and the net gain after the debit is ₹63,050. That’s the cap.

Two things work differently from a stock collar. First, index F&O contracts are cash-settled, as Zerodha’s physical settlement policy notes, so the hedge pays or costs you cash and your fund units stay where they are. Second, no real portfolio tracks the index perfectly. A fund’s expense ratio, a stock portfolio that doesn’t match the index, or a portfolio worth a lot more or less than one lot will all leave the hedge too big or too small. NSE’s Nifty 50 derivatives page says Nifty monthly options expire on the last Tuesday of the expiry month and weekly options every Tuesday, moving to the previous trading day if that Tuesday is a holiday, so choose the expiry that covers the period you’re worried about.

Physical settlement: what happens at expiry on a stock collar

Stock options in India are physically settled. Zerodha’s policy page says all stock F&O contracts on Indian exchanges require compulsory delivery, that stock options in the money at expiry lead to delivery of the underlying shares, and that out-of-the-money stock options expire worthless with no delivery obligation. For a collar, it plays out like this:

• Stock between the strikes: both options expire worthless and you keep your shares. You can set up a fresh collar for the next expiry if you still want protection.
• Stock above the call strike: the short call is in the money, so you give delivery of your shares at the call strike. That is the ceiling being enforced.
• Stock below the put strike: the long put is in the money, and a long in-the-money put is also a give-delivery position, so your shares go out at the put strike. That is the floor being enforced.

Either way, if the stock finishes outside the band, your shares can leave your demat account at expiry. If you want to keep holding, close or roll the in-the-money option before expiry rather than letting it settle. Zerodha also explains that exchanges start collecting physical delivery margins on in-the-money stock options from four days before expiry, rising as expiry gets closer, so make sure your account can carry them or get out in time.

On a stock collar, either option finishing in the money can mean your shares are delivered at expiry. If you want to keep the stock, deal with the hedge before expiry day.

How to choose strikes and expiry

• Start with the loss you can accept. Decide the worst outcome you are willing to take on the position for this period, then choose the put strike that gives that floor after the net premium.
• Then see what upside you have to give away. Look for a call strike whose premium covers most of the put cost. If the only call that pays for the put is very close to today’s price, the collar leaves you almost no upside, and selling part of the holding may be simpler.
• Match the expiry to the risk. A short-dated collar is cheaper to set up but has to be renewed often, with fresh costs each time. A longer expiry protects you for longer, but strikes further out may have little trading activity, so check bid-ask spreads before you place orders.
• Volatility affects both legs. Investopedia notes that collars tend to work best when volatility is high, because the call you sell brings in more premium. High volatility also makes the put more expensive, so compare the net premium, not just one leg.
• Stay fully covered. Hedge whole lots only. Selling more calls than you have shares for turns the excess into a naked call, which carries open-ended risk on a rally and possible short-delivery penalties at expiry.

When a collar works, and when it disappoints

A collar fits an investor who is neutral to moderately bullish, already has a decent gain, and wants to stay invested through a risky stretch such as an earnings announcement or a volatile market. It does its best work when the stock drifts within the band or falls hard, because that’s when the put earns its keep.

There are three common ways it lets you down:

• A strong rally: the short call caps your gain, and Investopedia points out that this is the main drawback of a collar. If you are very bullish, a collar limits the profits you expect.
• A quiet market that never tests the floor: if the stock does not fall to the put strike, the money spent on the put was, in hindsight, unnecessary. On a debit collar that is a direct cost.
• Repeated rolling: renewing collars every month adds brokerage, statutory charges and bid-ask slippage each time. Over a year those costs can be larger than the protection was worth.

Investopedia also notes that you can adjust or unwind a collar before expiry by buying back the call and selling the put, though that has its own costs and changes the final result. For more on deciding how much risk to take in the first place, see our guide to risk management in trading.

Collar compared with related strategies

The collar is easiest to understand next to its two halves. A covered call on its own gives you premium income but no floor; our covered call strategy guide covers how that works. A protective put on its own gives you a floor and leaves the upside open, but you pay the full put premium, which Investopedia likens to buying insurance on the shares. The collar sits in between, with a floor, a ceiling and a net premium near zero. And if you only want to express a view without owning the stock, a defined-risk spread such as a bear call spread is a different tool for a different job.

Key takeaways

• A collar options strategy means owning the shares, buying an out-of-the-money put and selling an out-of-the-money call with the same expiry.
• Your result at expiry is held between the put strike and the call strike, adjusted for the net premium. Maximum loss, maximum gain and breakeven can all be worked out before you trade.
• Stock options in India are physically settled, so either leg finishing in the money can mean your shares are delivered at expiry. Index options are cash-settled.
• Hedge whole lots, choose the floor first, and include costs and the upside you are giving up before you decide a collar is worth it.

Disclaimer: This article is for information and education only and is not investment advice or a recommendation to buy or sell any security. Options involve risk and are not suitable for every investor. Consult a SEBI-registered investment adviser before making investment decisions.