Collar
Protect a holding with a put and pay for it by selling a call — losses and gains both capped in a band.
Quick Answer
A Collar holds the underlying, buys a protective put below the current price and sells a call above it, so the loss is floored below the put strike and the gain is capped above the call strike. The short call finances the put, often making the pair a small credit, a small debit, or roughly zero-cost.
Collar: key takeaway
A Collar boxes a holding into a defined band — a long put sets the floor, a short call sets the ceiling and pays for the put — so a holder trades away the uncapped upside for cheap, defined downside protection on a position they want to keep.
Collar at a glance
| Category | Option Selling Strategies |
|---|---|
| Market outlook | Neutral |
| Risk | Defined risk |
| Net flow | Credit |
| Difficulty | Intermediate |
| Legs | Hold the underlying + buy 1 OTM put + sell 1 OTM call |
| Max profit | ₹364/unit · ₹23,660 per lot |
| Max loss | ₹236/unit · ₹15,340 per lot |
| Breakeven | 23,936 |
Collar in simple words
A collar is a way to hold something while boxing in what it can do to you. You own the underlying, you buy a put as insurance against a fall, and you sell a call to pay for that insurance. The put sets a floor: below its strike your loss stops. The call sets a ceiling: above its strike you give up any further gain. In between, the position tracks the underlying as normal. Because the call premium pays for the put, a collar can cost almost nothing to put on — sometimes it even brings in a small credit. The trade is a holder accepting a capped upside in exchange for a cheap, defined floor beneath a position they want to keep.
Payoff diagram
Profit & loss at expiry — Collar
| Leg | Action | Type | Strike | Premium | Qty |
|---|---|---|---|---|---|
| 1 | Buy | Underlying | 24,000 | — | 1 |
| 2 | Buy | Put | 23,700 | ₹211 | 1 |
| 3 | Sell | Call | 24,300 | ₹275 | 1 |
Collar: professional explanation
The collar is a defined band around a holding
A collar wraps a long position in the underlying with a long put below and a short call above, turning an open-ended holding into a defined band. Below the put strike the long put gains a rupee for every rupee the underlying loses, so the position value stops falling — that is the floor. Above the call strike the short call loses a rupee for every rupee the underlying gains, so the position value stops rising — that is the ceiling. Between the two strikes the collar simply tracks the underlying one-for-one. The risk is genuinely defined, because the put, not the underlying reaching zero, sets the floor.
Where the short call in a collar earns its keep
The defining feature of a collar is that the short call pays for the protective put. A protective put alone is a certain cost — the premium — paid every period to insure a holding. The collar sells away the upside above the call strike and uses that premium to fund the put. When the call premium exactly matches the put premium the structure is a zero-cost collar; on a skewed chain the call may bring in slightly more or less, giving a small net credit or debit. The cost of that cheaper insurance is real: it is the rally above the call strike the holder has agreed to forgo.
How a collar reduces the delta of the holding
A collar is close to delta-neutral inside its band and its Greeks are muted. The long put carries negative delta and the short call carries negative delta, and together they trim the +1 delta of the underlying, so the collared position responds far less to small moves than the holding alone. Vega and theta are similarly small, because the long put and short call sit on opposite sides and partly cancel. This is why a collar feels quiet: near the money the two options offset, and only as the underlying approaches a strike does one leg begin to dominate and the band's edge come into view.
Assignment and the practical cost of a collar on an index
A collar built on physically settled stock options carries early-assignment risk on the short call, especially near an ex-dividend date, which can hand the holder a delivery obligation before expiry. On cash-settled index options such as NIFTY there is no assignment, but a retail trader cannot hold spot NIFTY, so the underlying leg is a proxy — index futures carrying SPAN plus exposure margin, or a fully paid index ETF. That is why 'long underlying at 24,000' stands in for whatever tradable instrument is actually held, and why the capital tied up in the holding, not the options, dominates the collar's cost.
Construction
- Hold, or buy, the underlying — for an index view a proxy such as index futures or an ETF, since spot NIFTY cannot be held.
- Buy one out-of-the-money put for each unit held, setting the floor at its strike.
- Sell one out-of-the-money call for each unit held, setting the ceiling at its strike; the premium collected pays for the put.
Market outlook
A trader may study a collar when they want to keep a holding through an uncertain period but are unwilling to carry its full downside, and are content to cap the upside to pay for that protection. It suits a neutral-to-mildly-bullish view over the option's life — enough conviction to hold, not enough to want the unencumbered upside. Because the holder is buying insurance and selling upside at the same time, the structure does not hinge on a particular volatility regime the way a speculative option does. The rationale weakens if the holder would happily sell the position outright, or expects a strong rally, since the ceiling then surrenders exactly the gain they were positioned for.
Risk profile
A collar is a defined-risk position. The maximum loss is the distance from the entry price down to the put strike, less any net credit received (or plus any net debit paid), times the lot size — reached at or below the put strike. That floor comes from the long put, not from the underlying reaching zero, which is what would bound an unhedged holding. This is the collar's whole point: the floor is close and defined rather than distant and notional. The certain cost of the floor is the upside surrendered above the call strike, funded by the call premium rather than paid in cash.
Maximum loss, stated three ways
As a formula: (Entry price − put strike − net credit received) × lot size, reached at or below the long put strike, where the downside is floored by the put.
Computed from the illustrative legs: ₹236 per unit, i.e. ₹15,340 for one NIFTY lot of 65.
Breakeven: Entry price − net credit received (or + net debit paid). For a zero-cost collar the breakeven sits at the entry price. → 23,936.
Reward profile
The reward on a collar is capped and modest. The most it can make is the distance from the entry price up to the call strike, plus any net credit, times the lot size, reached at or above the call strike, where every further rupee of the underlying's rise is surrendered to the call buyer. Between the two strikes the position gains and loses with the underlying one-for-one. The collar therefore trades away the uncapped upside of the holding for a defined floor and a known, limited gain — the deliberate shape of a position built to survive a bad move rather than to maximise a good one.
Maximum profit
As a formula: (Call strike − entry price + net credit received) × lot size, reached at or above the short call strike, where the upside is capped.
Computed from the illustrative legs: ₹364 per unit, i.e. ₹23,660 for one NIFTY lot.
Margin requirement
The long put is fully paid and needs no margin. On fully owned stock the short call is covered by the holding, so no extra option margin is charged. On an index view the underlying is a futures proxy carrying SPAN plus exposure margin, recomputed intraday and rising if the market falls; an ETF ties up its full value instead. Brokers and NSE revise margin rules periodically, so the requirement should be confirmed before the position is built. The dominant capital cost is the holding, not the collar's options.
Greeks exposure
Positive but well below the underlying's +1 near the money, because the long put and short call both trim delta; it fades toward zero as the underlying nears either strike and the band's edge is reached.
Small and mixed: the long put adds positive gamma, the short call negative gamma, so the net is muted inside the band.
Small: the long put decays against the position while the short call decays in its favour, so the two largely offset near the money.
Low and mixed: long-put vega and short-call vega partly cancel, so a collar is relatively insensitive to implied volatility inside its band.
Minor for short-dated positions; the two opposite-signed legs leave little net rate sensitivity.
The sign on each Greek above is computed, not asserted: it is the net exposure of the illustrative legs at spot 24,000 with 30 days to expiry, priced with Black–Scholes using each leg's implied volatility calibrated from its own quoted premium. A sign can flip as the underlying moves — the panels below show where. See Methodology.
Net Greeks across underlying prices
Volatility impact
A collar is close to vega-neutral inside its band, because the long put and the short call carry opposite-signed vega that largely cancels near the money. Rising implied volatility lifts the put the holder owns but also the call they are short, so the net effect on the position is small and depends mainly on which strike the underlying is nearer. This muted volatility sensitivity is a feature: the collar is built to define a price band, not to take a view on volatility, so it neither benefits much from a volatility spike nor suffers much from a crush. Skew matters at entry, though — richer downside puts and the call premium available together decide whether the collar opens for a credit, a debit or zero cost.
Sensitivity to implied volatility
Time decay
Time decay is muted and roughly offsetting for a collar held near the money. The long put loses time value each day, a drag, while the short call loses time value in the holder's favour, a benefit, so the two largely cancel while the underlying sits between the strikes. As the underlying drifts toward one strike, that leg's decay begins to dominate — near the call strike the short call's favourable decay leads, near the put strike the long put's unfavourable decay leads. Over a long holding the repeated cost of rolling the protective put is the main theta drag, partly defrayed each period by the call sold against it.
Value of the position as expiry approaches
Collar: practical examples
NIFTY example
Holding NIFTY exposure at 24,000, a trader buys the 23,700 put at ₹211 and sells the 24,300 call at ₹275, taking in a net credit of ₹64 per unit (₹64 × 65 = ₹4,160 for one lot). Below 23,700 the loss is floored at (24,000 − 23,700 − 64) × 65 = 236 × 65 = ₹15,340. Above 24,300 the gain is capped at (24,300 − 24,000 + 64) × 65 = 364 × 65 = ₹23,660. Between the strikes the position tracks the underlying one-for-one, and the breakeven sits at 23,936. Premiums are from the site's illustrative 30-day chain; lot size 65 as of July 2026.
BANKNIFTY example
Illustrative BANKNIFTY, spot ~52,000, lot 30: buy the 51,500 put at ₹430 and sell the 52,500 call at ₹470, a net credit of ₹40 per unit = ₹1,200 for one lot. Downside is floored near 51,500 at (52,000 − 51,500 − 40) × 30 = 460 × 30 = ₹13,800. Upside is capped near 52,500 at (52,500 − 52,000 + 40) × 30 = 540 × 30 = ₹16,200. Breakeven is 51,960. Premiums are illustrative; lot size is as of July 2026.
Lot sizes used above (NIFTY 65, BANKNIFTY 30) are those in force as of July 2026; NSE revises them periodically. Figures exclude brokerage, STT, exchange charges, stamp duty and GST, all of which materially affect small spreads.
Common misconceptions about Collar
- Misconception: A zero-cost collar removes the downside entirely because it costs nothing to open.
Reality: No. A zero-cost collar only means the call premium collected offsets the put premium paid, so the options net to roughly zero. The underlying holding can still fall to the put strike, where the loss is floored — about ₹15,340 per lot in the illustrative legs. A collar caps the downside at a known figure; it does not eliminate it.
Common mistakes with Collar
- Treating a zero-cost or credit collar as a free trade, when the floored loss below the put strike is a real, defined loss of the holding's value.
- Forgetting the ceiling: a strong rally above the call strike is fully surrendered, so a collar is the wrong wrapper for a position held for a big upside move.
- Setting the call strike too close to the money for extra premium, which caps the upside so tightly the holding can barely gain before being called away.
- On stock options, overlooking early assignment of the short call around an ex-dividend date, which can force delivery of the underlying before expiry.
- Ignoring that on an index the underlying leg is a futures or ETF proxy whose own margin and carry — not the collar's options — dominate the capital and the risk of a margin call.
- Rolling the protective put indefinitely without accounting for the repeated premium, which over a long holding is the collar's largest running cost even when the call helps fund it.
Advantages & disadvantages
Advantages
- The downside is floored at a known, defined level set by the long put, not by the underlying reaching zero.
- The short call finances the put, so the protection can cost close to nothing — sometimes a small net credit.
- Inside its band the position is quiet: delta, vega and theta are all muted by the offsetting legs.
- It lets a holder keep a position through an uncertain period without selling and crystallising a gain or a tax event.
- The maximum loss and maximum gain are both known before entry, which makes the position easy to size against a holding.
Disadvantages
- The upside above the call strike is fully surrendered — a collar forgoes exactly the strong rally a holder might have wanted.
- The floored loss is still a real loss; the structure caps the downside, it does not remove it.
- Maintaining continuous protection means rolling the put, and each roll costs premium the call only partly offsets.
- On stock options the short call carries early-assignment mechanics to manage around dividends.
- On an index the underlying proxy carries its own margin and carry, which usually dominate the collar's economics.
Adjustments & exits
- Rolling the protective put up as the underlying rises ratchets the floor higher to lock in accumulated gains, at the cost of a larger put premium.
- Rolling the short call up and out gives the holding more room to rise before the ceiling bites, usually for a smaller net credit or a debit.
- Widening the band — a lower put strike and a higher call strike — loosens both the floor and the ceiling, trading cheaper insurance for a larger floored loss.
- Closing the whole collar and holding the underlying unencumbered restores full upside once the uncertain period the collar was built for has passed.
Adjustment is a decision about risk, not a way to rescue a losing view. See Adjustments and Exit Planning.
How professionals use the Collar
Institutions and large holders use collars to protect concentrated or low-basis positions cheaply, defining a floor for a reporting period or through an event while surrendering upside they judge unlikely or acceptable to forgo. Because the short call funds the put, a collar can be layered across a book at near-zero premium, and desks roll the strikes to track the holding and manage the surrendered upside. On index proxies the collar interacts with futures roll and carry, so the practical work is in the underlying leg as much as the options. For a retail holder the structure is straightforward to build but is a defensive wrapper on a position worth keeping, not a standalone income or directional trade.
Collar: frequently asked questions
What is the maximum profit on a collar?
The distance from the entry price up to the call strike, plus any net credit, times the lot size — (24,300 − 24,000 + 64) × 65 = ₹23,660 in the NIFTY example. It is reached at or above the short call strike, beyond which every further rupee of the underlying's rise is surrendered to the call buyer.
What is the maximum loss on a collar?
The distance from the entry price down to the put strike, less any net credit, times the lot size — (24,000 − 23,700 − 64) × 65 = ₹15,340 in the NIFTY example. It is reached at or below the long put strike, where the put floors the position. The loss is defined, set by the put rather than by the underlying reaching zero.
What is a zero-cost collar?
A zero-cost collar is one where the call premium collected exactly funds the put premium paid, so the options cost nothing net at entry. The holder gets a defined floor in exchange for a defined ceiling, with no cash outlay for the options. On a skewed chain the pair may net to a small credit or debit rather than exactly zero.
Where is the breakeven on a collar?
For a credit collar the breakeven sits at the entry price minus the net credit — 24,000 − 64 = 23,936 in the NIFTY example. For a debit collar it is the entry price plus the net debit, and for a true zero-cost collar it sits at the entry price itself. Between the strikes the position tracks the underlying from that breakeven.
Does a collar work on NIFTY when spot cannot be held?
Yes, but the underlying leg is a proxy. Retail traders cannot hold spot NIFTY, so a collar is built on index futures or a fully paid index ETF, with index puts and calls around it. The futures proxy carries its own SPAN plus exposure margin, which usually dominates the collar's capital cost.
Why does a collar reduce how much my holding moves each day?
Because the long put and short call both carry negative delta that trims the underlying's +1, so near the money the collared position responds far less to small moves than the holding alone. Vega and theta are similarly muted by the offsetting legs, which is why a collar feels quiet inside its band.
Does a collar need a particular implied-volatility level?
Not strongly. A collar is close to vega-neutral inside its band because the long put and short call carry opposite-signed vega that largely cancels. Skew matters at entry — richer downside puts and the available call premium decide whether the collar opens for a credit, a debit or zero cost — but the structure is not a volatility bet.
Collar: voice-search questions
Natural-language questions people ask about the Collar.
What is a collar in options trading?
A collar is when you hold something, buy a put below it as insurance, and sell a call above it to pay for that insurance. Your loss is floored below the put and your gain is capped above the call.
Does a collar cost money to set up?
Often very little. The call you sell pays for the put you buy, so a collar can be near zero cost, and sometimes brings in a small credit. What you really pay is the upside you give up above the call strike.
When would someone use a collar?
When they want to keep a holding through an uncertain stretch but cannot stomach its full downside. They accept a capped upside in exchange for a cheap, defined floor under a position they would rather not sell.
Sources & references
Published 18 July 2026. Educational content only — not investment advice.