A collar puts a floor and a ceiling around a holding you already own. Below the floor you stop losing; above the ceiling you stop gaining. In between, the shares behave exactly as they would have anyway.
It is the natural next step after two structures already covered on this site — the protective put and the covered call — because it is simply both at once.
How it is built
You hold the shares. Against them you do two things with the same expiry.
Buy a put option below the current price. This is the floor. If the price falls below that strike, the put gains value roughly in step with the further fall, and your losses stop.
Sell a call option above the current price. This is the ceiling. The premium you receive helps pay for the put. If the price rises above that strike, the gain on your shares above it is offset by the loss on the call option.
Illustratively, with figures chosen to show the arithmetic rather than market prices: shares at 1,000. Buy the 900 put for 25. Sell the 1,100 call option for 20. Net cost 5.
Worst case: the shares fall to 900 and below, and your loss is 100 plus the net cost of 5 — 105 per share however far the price falls.
Best case: the shares rise to 1,100 and above, and your gain is 100 minus 5 — 95 per share however high the price goes.
Where the premium received exactly matches the premium paid, it is called a zero-cost collar. The name is slightly misleading: nothing is paid upfront, but the cost is real — it is the upside you have agreed to give away.
What you are actually trading
A collar converts an uncertain range of outcomes into a bounded one. Whether that is sensible depends entirely on your situation, not on the market.
It makes sense when the downside matters more to you than the upside over a specific period. A concentrated holding you cannot sell for tax or personal reasons. Shares whose value you need on a known date, for a payment or a purchase. A stretch of genuine uncertainty — an important result, a regulatory decision — where you want to keep the shares but not the full risk.
It makes less sense as a permanent arrangement on a long-term holding. Renewing collars continuously caps every rally you would otherwise have kept, and over years the large moves that you gave away are precisely the ones that build long-term returns.
Choosing the strikes is the decision that matters. A put close to the current price protects early but costs more, requiring a call option closer in to pay for it and capping gains tightly. Wider strikes cost less protection and give more room. There is no correct width in general; there is only the width that matches how much you can lose and how much gain you are prepared to give up.
The Indian details that change how it works
Only some stocks have options. The exchange maintains a list of stocks eligible for derivatives. If your holding is not on it, a direct collar is not available, and an index collar protects against the market rather than against your particular company.
Lot sizes decide the coverage. Options cover a fixed quantity. A holding smaller than one lot cannot be collared, and a holding that is not a multiple of the lot leaves some shares unprotected or some option exposure unmatched.
Stock options settle by delivery. If the share finishes above the call option strike at expiry, the call is exercised and you deliver the shares — which, in a collar, you own, so the delivery is covered. If you intended to keep the shares, you need to close or roll the position before expiry rather than letting it settle. If the share finishes below the put strike, the put delivers shares from you at the strike price, which is the floor working as designed.
Margin applies to the sold call option, though holding the underlying shares, and pledging them, significantly changes what is required. Understand the requirement before entering rather than discovering it when it moves.
Tax differs between the legs. Gains and losses on the options are generally treated as business income, while the shares fall under capital gains. A collar that is economically neutral can produce a taxable gain on one side and a loss on the other that do not offset in the way you might expect.
Insider rules may prevent it entirely. Promoters, directors and designated employees are generally prohibited from taking derivative positions in their own company's shares.
Managing it through to expiry
A collar needs less attention than most option positions and still needs some.
Decide in advance what happens at expiry. Let it settle, close both legs, or roll to the next month. Each is reasonable; drifting into expiry without having decided is how people end up delivering shares they meant to keep.
Treat it as one position. Closing the put and leaving the call option open leaves you holding shares with the upside capped and no protection — the worst combination available. Enter together, exit together.
Watch the event, not the price. If you collared a holding for a specific reason — results, a decision, a payment date — the natural time to remove it is when that reason has passed, not when the price moves.
Check the arithmetic after costs. Brokerage, statutory charges and the spread on two option legs, entering and exiting, reduce the effective protection. On a small holding, those costs can be a meaningful share of the premium involved.
Holdings and both legs in one place
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All figures above are illustrative, chosen to show the arithmetic rather than actual market prices. Contract eligibility, lot sizes, margin and settlement rules are set by the exchanges and revised periodically. This is educational material, not advice, and nothing here recommends any position. We run no tips group and no signal service, we manage nobody's money, and no return is promised. Options can lose their premium, and sold options carry obligations.
Disclosure: the account-opening link on this page is under Atul Shrivastava's Zerodha Authorised Person registration (NSE AP Reg: AP2516003481; Zerodha Broking Ltd. SEBI Reg: INZ000031633) and earns a revenue share. TheFinBaba is not a SEBI-registered Investment Adviser — this content is educational, not investment advice.
Frequently Asked Questions
What is a collar strategy?
Holding shares, buying a put option below the current price and selling a call option above it, with the same expiry. The put sets a floor on losses and the sold call option caps gains, with its premium helping pay for the put.
Is a zero-cost collar actually free?
Nothing is paid upfront, because the premium received matches the premium paid. The real cost is the upside above the call option strike, which you have agreed to give away for the period.
What happens at expiry if the share rises above the call strike?
Single-stock options settle by delivery, so the call option is exercised and you deliver the shares you own at the strike price. If you meant to keep them, close or roll the position before expiry.
Can I collar a stock that has no listed options?
Not directly. Only stocks on the exchange's derivatives list have options. An index collar protects against broad market falls, not against your particular company.
Can a promoter collar their own company's shares?
Generally not. Insider trading rules usually prohibit promoters, directors and designated employees from taking derivative positions in their own company's shares. The company's compliance officer should be consulted first.
Related Reading
- Hedging concentrated holdings, for Coimbatore
- The ceiling half, on its own
- Why stock options deliver at expiry
- Choosing where the floor sits
- Why the option legs are taxed differently
- How much of a holding to cover
Disclaimer: TheFinBaba provides educational content only - this is not investment advice. Trading involves risk of loss.
