The Collar Strategy Explained: Protect Your Shares for (Almost) Free
How a collar protects a stock you own: buy a put below the price for a floor, sell a call above it for a ceiling, and let the call pay for the put. A full zero-cost example with max gain, max loss, breakeven, three outcomes at expiration, three ways to tune the strikes and how to manage the position
Options education. Examples use a hypothetical stock (XYZ) and illustrative premiums; they explain the mechanics, not a recommendation.
The problem with just holding stock
When you own shares, gains and losses are both open-ended: the stock can rise without limit, and it can fall all the way to zero. The classic fix is a protective put, the right to sell your shares at a set price, which works like insurance. The catch: insurance costs money, every single time.
A collar keeps the insurance and finds someone else to pay for it.
The three pieces of a collar
| Piece | What you do | Role |
|---|---|---|
| Own | 100 shares | the position you protect |
| Buy | a put below the price | the floor: limits losses |
| Sell | a call above the price | the ceiling: caps gains |
The premium you collect on the call pays for the put: often most of it, sometimes all of it.
Worked example: own XYZ at $100
| Leg | Premium |
|---|---|
| Own 100 shares at $100 | — |
| Buy 1 × 95 put (the floor) | −$2.00 |
| Sell 1 × 105 call (the ceiling) | +$2.00 |
| Net cost | $0.00: a zero-cost collar |
Floor at $95, ceiling at $105, nothing paid up front.
Max gain, max loss, breakeven
| Formula | Result | |
|---|---|---|
| Max loss (stock below 95) | (entry − put strike) × 100 = (100 − 95) × 100 | $500 |
| Max gain (stock above 105) | (call strike − entry) × 100 = (105 − 100) × 100 | $500 |
| Breakeven | entry ± net cost; zero cost, so unchanged | $100 |
| Between 95 and 105 | moves with the stock, dollar for dollar | 1 : 1 |
You give up the extremes on both sides in exchange for certainty.
Three outcomes at expiration
- A. XYZ drifts to $102. Both options expire worthless; you keep the shares. Result: +$200.
- B. XYZ drops to $85. The shares lose $1,500, the put gains $1,000. Result: −$500, instead of −$1,500 unprotected.
- C. XYZ jumps to $115. The shares gain $1,500, the call loses $1,000, and the shares are likely called away at $105. Result: capped at +$500.
Protected in a crash, still some gain in a rally, no home run.
Tuning the collar
Moving the strikes changes the balance between protection, upside and cost (same 95 put in all three):
| Version | Strikes | Net premium | Max gain | Max loss |
|---|---|---|---|---|
| Zero-cost | 95 put / 105 call | $0 | +$500 | −$500 |
| More upside | 95 put / 110 call | $1.00 debit | +$900 | −$600 |
| Extra income | 95 put / 103 call | $0.80 credit | +$380 | −$420 |
How the numbers come out: with a $1.00 debit, max gain = (110 − 100 − 1) × 100 = $900 and max loss = (100 − 95 + 1) × 100 = $600. With a $0.80 credit, max gain = (103 − 100 + 0.80) × 100 = $380 and max loss = (100 − 95 − 0.80) × 100 = $420.
More room to grow costs more; more income means less upside.
When does a collar make sense?
- After a run-up: to lock in most of the gains you already have.
- Before events: earnings or big economic news, when a sharp drop is possible.
- When you want to keep the shares: hold rather than sell, but with a floor.
- When you accept giving up some upside in exchange for peace of mind.
Setting one up: checklist
- Own the shares: usually 100 per collar.
- Floor: buy a put at the most you are willing to lose.
- Ceiling: sell a call where you would happily sell the shares.
- Same expiration for both; compare the net cost: zero, debit or credit.
- Watch early assignment risk on the call, especially before dividends.
- Plan the expiration: let it expire, renew it, or sell the shares.
Managing the collar
- Stock rising, close to the call: roll the whole collar up to lock in gains and get new room to grow.
- Stock falling: you are protected. Hold the put, sell it for a profit, or roll it down and out.
- You want to keep the shares: if the call goes in the money, roll it before assignment becomes likely.
- At expiration: put on a new collar, or simply hold the stock again.
Pros and cons
| Pros | Cons |
|---|---|
| Downside is limited | Upside is capped |
| Protection for little or no cost | Shares can be called away |
| You keep the shares (and dividends) | Needs 100 shares per collar |
| Worst case known in advance | Three positions to manage |
The collar in four lines
- Own the stock, buy a put below, sell a call above.
- The put is your floor: it limits your loss.
- The call is your ceiling: its premium pays for the put.
- You trade the big upside for protection; tune the strikes to set the balance.
Educational content only, not financial advice. Options involve risk and are not suitable for all investors. Figures exclude commissions, fees and dividends.