Collar strategy explained: buy a put for a floor, sell a call to fund it. Zero-cost collar math, payoff and exit rules in an illustrative JPM example.
Summary: A collar strategy protects shares you already own by buying an out-of-the-money put and selling an out-of-the-money call in the same expiration. The put sets a floor, the call sets a cap, and the call's premium pays for most or all of the put. In the illustrative JPM example at $340, a $320 put and a $355 call open for a $42 credit and hold the result between −$1,958 and +$1,542 at expiration. Because a floor only works against drops that go through it, the article ends with a hindsight-free testing routine that compares sudden gaps with slow declines on ten synthetic charts.
Last updated: 2026-10-19.
What Is a Collar Strategy?
A collar strategy is a three-part position: 100 shares of stock, one long put below the current price, and one short call above it, both in the same expiration. The put doesn't stop the stock from falling — it fixes a price at which you can sell it. The call is the price you pay for that right: you agree to give up gains above its strike.
Traders use three names for the same structure:
- A protective collar — the general term: shares plus a put floor plus a call cap.
- A zero-cost collar — a collar whose call premium roughly equals the put premium, so the protection costs little or nothing upfront.
- A collar option strategy — the search-engine name for the same thing.
If you know the covered call, a collar is a covered call with a put added. If you know the protective put from the long put guide, a collar is a protective put with a call sold to pay for it. Both halves already exist; the collar is the agreement between them.
The Thermostat Analogy
A collar is a thermostat for your shares: a floor, a cap, and the call pays the heating bill.
A thermostat set between 66°F and 74°F never lets the house freeze and never lets it overheat. Below 66 the heating kicks in; above 74 the air conditioning does. Inside the band, the temperature moves freely. A collar is that thermostat for your position: below the put strike the floor kicks in, above the call strike the cap does, and between them the shares move as usual.
The analogy also explains the cost. Heating and cooling aren't free, but a collar is a thermostat where the cooling bill pays the heating bill — the call you sell funds the put you buy.
Key Facts
- A collar = 100 shares + a long out-of-the-money put + a short out-of-the-money call, same expiration. The put strike is the floor; the call strike is the cap.
- In the illustrative JPM example at $340, 45 days out: buying the $320 put ($4.70) and selling the $355 call ($5.12) opens for a $0.42 credit, or $42.
- At expiration the result from $340 stays between −$1,958 (−5.8%) and +$1,542 (+4.5%), whatever JPM does.
- For shares bought at $280, the collar keeps at least $4,042 of the $6,000 open gain for as long as it lasts.
- Because lower strikes carry higher implied volatility, the zero-cost cap sits 4.4% above the price while the floor sits 5.9% below it.
- With an assumed 24% implied volatility, the chance of finishing above the $355 cap is about 31%, versus about 23% for finishing below the $320 floor.
- A collar backtest's protection depends on how the window's declines arrived: a 15% gap in one cycle costs $1,958, while about the same drop in three 5% steps costs $4,730, because the put never pays.
How a Collar Is Constructed
A collar has three legs, opened in this order:
- Own 100 shares of the stock — usually shares you already hold with a gain.
- Buy one put below the current price. This is the floor.
- Sell one call above the current price, in the same expiration. This is the cap, and the shares cover it.
The formulas, per share:
Net credit (or debit) = call premium − put premiumMaximum loss = (stock price − put strike) − net creditMaximum gain = (call strike − stock price) + net creditBreak-even = stock price − net credit (or + net debit)
The short call is covered by the 100 shares, so it carries no extra risk: if the stock rallies past the cap, the shares are what you deliver. The put is what turns "I hope it doesn't fall" into a defined worst case.
Collar Example: Protecting a JPM Gain
JPMorgan Chase (JPM) closed at $339.72 on October 16, 2026, according to the JPM quote on StockAnalysis, inside a 52-week range of about $279 to $367. The bank reported third-quarter results on October 13, so the next report and the next ex-dividend date both fall after a 45-day expiration. Picture an investor who bought 100 shares near the low at $280 and is now sitting on a $6,000 gain they don't want to give back.
The example below is an illustrative scenario with JPM at $340 and 45 days to expiration. It assumes a 4% interest rate, no dividend before expiration, and implied volatility of 27.5% for the $320 put and 21.5% for the $355 call. These are assumptions chosen to show the mechanics, not quotes. The numbers are for learning, not a recommendation to trade JPM.
| Leg | Strike | Delta | Price (per share) |
|---|
| Own 100 shares | — | +1.00 | $340.00 |
| Buy 1 put | $320 | −0.23 | $4.70 debit |
| Sell 1 call | $355 | −0.32 | $5.12 credit |
| Net position (shares + options) | | +0.45 | $0.42 credit = $42 |
The math: the floor is $340 − $320 = $20 below the price, minus the $0.42 credit, so the worst case is $19.58 per share, or $1,958. The cap is $355 − $340 = $15 above, plus the credit, so the best case is $15.42 per share, or $1,542. Measured from the $280 purchase price, the collar keeps at least $40.42 per share — $4,042 of the $6,000 gain — until expiration.
Collar Payoff Diagram
Collar payoff at expiration compared with the shares alone, with the value at 21 days left dashed.
| JPM at expiration | Shares alone | Collar |
|---|
| $280 | −$6,000 | −$1,958 |
| $300 | −$4,000 | −$1,958 |
| $320 | −$2,000 | −$1,958 (floor) |
| $330 | −$1,000 | −$958 |
| $340 | $0 | +$42 |
| $355 | +$1,500 | +$1,542 (cap) |
| $370 | +$3,000 | +$1,542 |
| $390 | +$5,000 | +$1,542 |
The shape is a ramp between two flat lines. Below $320 the line is flat at −$1,958 no matter how far JPM falls. Above $355 it's flat at +$1,542 no matter how far JPM climbs. Between the strikes, the collar moves dollar for dollar with the shares, $42 better than the shares alone.
Zero-Cost Collar: Why the Cap Sits Closer Than the Floor
In the example the floor is 5.9% below the price, but the cap is only 4.4% above it — and the trade still opens for a small credit. That asymmetry isn't a typo. In most stock markets, out-of-the-money puts carry higher implied volatility than equally distant calls, because investors pay up for downside protection. This tilt is called skew, and it makes the put you buy relatively expensive and the call you sell relatively cheap.
The practical result: a zero-cost collar usually puts the cap closer to the price than the floor. With an assumed 24% at-the-money volatility, the chance of JPM finishing above the $355 cap is about 31%; the chance of finishing below the $320 floor is about 23%. You're more likely to feel the cap than the floor. That's the real price of "zero cost."
Compare the alternative. A protective put on its own — just the $320 put — costs $470 and leaves the upside fully open. Its worst case is $2,470 instead of $1,958, but a rally to $390 keeps the shares' $5,000 gain, less the $470 premium ($4,530). Which one fits depends on whether you mind paying cash now or giving up gains later. For how implied volatility drives these premiums, see implied volatility explained.
How the Greeks Affect a Collar
The table shows the net values per share for the whole position — shares, put and call together; the right-hand column translates them into dollars per collar. (Background in the option Greeks explained.)
| Greek | Collar (per share) | What it means for you |
|---|
| Delta (Δ) | +0.45 | About +$45 per $1 JPM moves — less than half the exposure of the shares alone |
| Gamma (Γ) | −0.005 | Slightly negative: the short call's gamma is larger than the put's at entry |
| Theta (Θ) | +0.011 | Close to zero: about $1 per day, because the two options' time decay nearly cancels |
| Vega (ν) | −0.061 | Each 1-point rise in implied volatility costs about $6 — almost neutral |
The delta is what changes your experience day to day. On day one, the collar moves about $45 for every $1 JPM moves, not $100. That works both ways. If JPM dropped to $300 within 10 days and volatility jumped eight points, the collar would show a loss of about $1,504 while the shares alone would be down $4,000. If JPM rallied to $355 with 21 days left, the collar would show about +$822 while the shares alone would show +$1,500.
Notice that the floor isn't fully "on" before expiration. With 21 days left and JPM at $320, the collar shows about −$1,169, not the −$1,958 floor — the put still has time value, and the short call still has a little too. The floor and the cap are exact only at expiration; along the way, the position is a softened version of the stock.
When to Use a Collar
- You hold shares with a gain you don't want to give back, but you don't want to sell them yet.
- You can name a risk window — a period where a drop would hurt more than a missed rally.
- Puts look expensive on their own, so selling a call to fund the protection makes sense.
- You'd be content to sell at the call strike if the stock got there.
When NOT to Use a Collar
- You expect a strong rally. The cap gives it away: a move to $390 leaves the collar at +$1,542 instead of +$5,000.
- You'd regret selling the shares at the cap. In the real market, a call that finishes in the money means your shares are called away.
- You want protection against a slow, months-long decline. A floor only pays when the price goes through it — see the backtest section below.
- The position is small. Two option legs for a few hundred dollars of protection can cost more in commissions than they save.
Collar Entry Criteria and Exit Rules
Entry Criteria: When to Open a Collar
- Shares with a gain worth protecting — at least 100 per collar.
- A risk window you can name, roughly the length of the expiration.
- Put 5–10% below the price: close enough to matter, far enough to stay affordable.
- Call at a price where you'd accept selling.
- Net cost near zero — a small credit or a small debit.
- 30 to 60 days to expiration.
Exit Rules: Managing a Collar
When to open a collar and how to manage it.
- Decide before expiration whether to roll into a new collar, keep only the shares, or sell everything.
- After a rally, roll the floor up. Close both options and open a new collar around the higher price to protect the new gain.
- After a drop through the floor, decide — don't roll down by reflex. Rolling the floor down every cycle locks in each loss.
- Close the options as a pair. Closing only the put leaves a covered call with no floor; closing only the call leaves a protective put.
- Watch a deep in-the-money call before an ex-dividend date. In the real market, early assignment is most likely then.
💡 Pro Tip: Price the cap in dollars before you open the collar. Ask: "If JPM ran to $390 by expiration, what would I give up?" In the example, the answer is $3,458 — the difference between the shares' +$5,000 and the collar's +$1,542. If that number would sting more than a $1,958 loss, buy the put alone or move the call higher.
Common Collar Mistakes
- Choosing strikes by "zero cost" alone. The pair that nets to zero is set by skew, not by your view; check where the cap lands.
- Calling one 45-day collar "protected for the year." The floor exists only until expiration and only at its strike.
- Selling the call too close. A cap 2% above the price turns a protective position into a sale you already agreed to.
- Rolling the floor down after every drop. Each roll re-sets the floor below a price you've already lost.
- Forgetting the shares behind the call. Selling the shares while the short call stays open turns a covered call into a naked one.
⚠️ Warning: A collar caps your gains in exchange for a floor, and the floor is set once per expiration. If the stock falls 5% in every cycle and never breaks the floor inside one cycle, the put never pays — and the collar loses almost as much as the shares.
What a Backtest Can't Tell You About a Collar
A collar backtest quietly assumes something about how the window's declines arrived. If the test period's big losses came as sharp breaks — a 15% drop inside one expiration — the put paid every time, and a floor 6% below the price looks like it caps everything. If the same losses came as a slow slide, the floor was never touched. The distance the backtest recommends for the put is fitted to the shape of the declines the window happened to contain, not to the declines your shares will meet.
Run the article's own collar both ways. A one-cycle gap from $340 to $289 costs the collar $1,958 while the shares alone lose $5,100. Now let JPM fall 5% per cycle for three cycles — $340 to $323 to $306.85 to $291.51 — with a fresh collar at the same distances each time. Every cycle ends just above its floor, the put never pays, and the collar loses $4,730 against $4,849 for the shares alone. Almost the same 14% to 15% decline, and the protection did nearly nothing.
A backtest answers "what would have happened"; hindsight-free testing is testing a trading rule on a market chart that did not exist when you wrote the rule, so the rule cannot be bent to fit the past. For a collar, that means fixing the floor distance and the roll rule before you see the chart, then counting how often the decline slipped past the floor in small steps — forward testing on synthetic markets shows you the grind as well as the gap. Why this matters for any rule you tune on history is laid out in hindsight-free testing.
How to Practice a Collar Without Real Money
Pilots don't learn engine failures by waiting for one. They practice them in a flight simulator until the response is automatic. A collar's hard moments — the drop through the floor, the rally into the cap, the decision to roll — are the same: rare in any one holding period, and much better rehearsed before your own gain is on the line.
In the simulator, you can build a collar from the option chain in three steps: "Buy" 100 shares, buy the put with the "B" button, then sell the call with the "S" button in the same expiration. The simulator accepts the short call as covered by your shares and reserves no extra collateral for it. The Strategies tab also has a "Collar" template; its strikes are set by the template and can't be edited, so use the chain when you want the exact distances from this article. Two differences from the real market: the simulator pays no dividends, so there's no early-assignment risk around ex-dividend dates, and an in-the-money short option is settled in cash at expiration rather than by delivering your shares.
Run It Forward: 10 Charts, One Rule
- Step 1: Write the rule down first. Hold 100 shares; buy a put about 6% below the price and sell a call about 4–5% above it in the expiration closest to 45 days, for a net cost no larger than 0.5% of the stock price; close both options on the last candle before expiration and open a new collar at the same distances; never change the distances after a drop.
- Step 2: Generate a chart. In "Model Settings", choose the "Random" scenario and a length of 6m. Use "Essential 1 [ Steady Drift ]" for five charts and "Essential 2 [ Sudden Shock ]" for the other five.
- Step 3: Open the position in this order. Check that available cash covers 100 shares, then "Buy" 100 shares, buy the put, and sell the call — the shares cover it. Write down the floor and the cap before the first candle.
- Step 4: Step forward candle by candle. Roll at each expiration exactly as written, with no change to the distances after a scare.
- Step 5: Record four things. The collar's total result, the shares-alone result on the same chart, how many cycles the put finished in the money, and the worst drawdown.
- Step 6: Repeat on 10 charts. Compare the two models' results side by side and count the charts where the stock fell more than 6% in total while the put never paid. That count is the slow decline a gap-heavy backtest window hides.
FAQ
What is a collar strategy in options?
A collar combines 100 shares you own with a long out-of-the-money put and a short out-of-the-money call in the same expiration. The put sets a floor under the shares, the call caps their upside, and the call's premium pays for most or all of the put. In the JPM example, the result at expiration stays between −$1,958 and +$1,542.
What is a zero-cost collar?
A zero-cost collar is a collar whose call premium roughly equals the put premium, so the protection costs little or nothing upfront. The cost moves elsewhere: because puts usually carry higher implied volatility than calls, the cap ends up closer to the price than the floor. In the example, a 5.9% floor is paid for by a 4.4% cap.
Is a collar better than a protective put?
Neither is better; they charge differently. A protective put costs cash upfront — $470 for the $320 put in the example — and keeps the upside open. A collar costs little or nothing upfront but gives away gains above the call strike: a rally to $390 would leave it $3,458 behind the shares alone.
What happens if the stock rises above the call strike?
Your gain stops at the cap. In the real market, a call that finishes in the money is usually assigned, and your shares are sold at the call strike — $355 in the example — for a total gain of $1,542 from $340. If you want to keep the shares, close or roll the call before expiration.
Can you backtest a collar?
Yes, but the protection a collar backtest shows depends on how the window's declines arrived. Sharp drops inside one expiration make the floor look perfect; slow declines that stay above each floor make it look useless. Running a fixed collar rule on synthetic charts you didn't choose shows how your floor distance handles both.
Related: Covered Call, Long Put, Implied Volatility Explained, Option Greeks Explained, Options Expiration Guide, Backtesting vs Simulated Data.
About the author: Miroslav Slavkovský is the founder of OptionsSimulator and a software developer focused on derivatives-pricing models. He built the platform's simulation engine — implementing Heston, SABR, GARCH, and Monte Carlo methods — so traders can practise options strategies on generated market scenarios rather than on historical charts.
Practice a Collar on a Synthetic Chart
Want to see how a collar holds up when the drop comes slowly instead of all at once — without risking real shares? Open the simulator, buy 100 shares, put a floor and a cap around them, and run the rule forward on a synthetic chart that has never existed.
Open Simulator
Step-by-step guide
- Write the rule down first. Hold 100 shares; buy a put about 6% below the price and sell a call about 4–5% above it in the expiration closest to 45 days, for a net cost no larger than 0.5% of the stock price; close both options on the last candle before expiration and open a new collar at the same distances; never change the distances after a drop.
- Generate a chart. In "Model Settings", choose the "Random" scenario and a length of 6m. Use "Essential 1 [ Steady Drift ]" for five charts and "Essential 2 [ Sudden Shock ]" for the other five.
- Open the position in this order. Check that available cash covers 100 shares, then "Buy" 100 shares, buy the put, and sell the call — the shares cover it. Write down the floor and the cap before the first candle.
- Step forward candle by candle. Roll at each expiration exactly as written, with no change to the distances after a scare.
- Record four things. The collar's total result, the shares-alone result on the same chart, how many cycles the put finished in the money, and the worst drawdown.
- Repeat on 10 charts. Compare the two models' results side by side and count the charts where the stock fell more than 6% in total while the put never paid. That count is the slow decline a gap-heavy backtest window hides.
Frequently asked questions
What is a collar strategy in options?
A collar combines 100 shares you own with a long out-of-the-money put and a short out-of-the-money call in the same expiration. The put sets a floor under the shares, the call caps their upside, and the call's premium pays for most or all of the put. In the JPM example, the result at expiration stays between −$1,958 and +$1,542.
What is a zero-cost collar?
A zero-cost collar is a collar whose call premium roughly equals the put premium, so the protection costs little or nothing upfront. The cost moves elsewhere: because puts usually carry higher implied volatility than calls, the cap ends up closer to the price than the floor. In the example, a 5.9% floor is paid for by a 4.4% cap.
Is a collar better than a protective put?
Neither is better; they charge differently. A protective put costs cash upfront — $470 for the $320 put in the example — and keeps the upside open. A collar costs little or nothing upfront but gives away gains above the call strike: a rally to $390 would leave it $3,458 behind the shares alone.
What happens if the stock rises above the call strike?
Your gain stops at the cap. In the real market, a call that finishes in the money is usually assigned, and your shares are sold at the call strike — $355 in the example — for a total gain of $1,542 from $340. If you want to keep the shares, close or roll the call before expiration.
Can you backtest a collar?
Yes, but the protection a collar backtest shows depends on how the window's declines arrived. Sharp drops inside one expiration make the floor look perfect; slow declines that stay above each floor make it look useless. Running a fixed collar rule on synthetic charts you didn't choose shows how your floor distance handles both.