Collar¶
PLAIN-ENGLISH DEFINITION¶
A collar is a three-leg options strategy that combines a long stock position, a long protective put below the current price, and a short call above the current price. The put establishes a hard floor on downside loss. The short call finances the put — partially, fully, or with a credit — by capping upside above its strike. The result is a bounded P&L profile: the position cannot lose more than the distance to the put strike plus any net premium paid, and cannot gain more than the distance to the call strike minus that premium.
HOW A COLLAR IS CONSTRUCTED¶
A standard collar uses one option contract (100 shares) per long stock lot:
- Hold 100 shares at entry price S₀
- Buy 1 put at strike Kₚ below S₀
- Sell 1 call at strike K_c above S₀
Position math at expiration
| Metric | Formula |
|---|---|
| Max profit | K_c − S₀ − net premium paid |
| Max loss | S₀ − Kₚ + net premium paid |
| Breakeven | S₀ + net premium paid |
When the call premium equals the put premium, the structure is a zero-cost collar — protection costs nothing in cash outlay, only the upside above K_c.
WORKED EXAMPLE¶
Suppose you own 100 shares of AAPL at $200, sitting on an unrealized gain you do not want to surrender before year-end. With AAPL at $200 you build a June zero-cost collar:
- Buy 1 June $190 put for $4.00 ($400 debit)
- Sell 1 June $215 call for $4.00 ($400 credit)
- Net premium: $0
| AAPL at Expiry | Stock P&L | Put | Call | Total |
|---|---|---|---|---|
| $180 | −$2,000 | +$1,000 | $0 | −$1,000 |
| $190 | −$1,000 | $0 | $0 | −$1,000 |
| $200 | $0 | $0 | $0 | $0 |
| $215 | +$1,500 | $0 | $0 | +$1,500 |
| $230 | +$3,000 | $0 | −$1,500 | +$1,500 |
Max loss is capped at $1,000 (a 5% drawdown). Max gain is capped at $1,500 (a 7.5% gain). Outside the $190–$215 band, P&L is frozen.
WHEN TRADERS USE IT¶
Collars are deployed to lock in unrealized gains on concentrated long positions without triggering a taxable sale, to hedge a stock through binary events such as earnings or an FDA decision, and to manage retirement account exposure where downside protection matters more than upside capture. Pension funds, ETFs offering "buffered" exposure, and corporate insiders subject to 10b5-1 plans use collars at institutional scale.
LIMITATIONS AND MISCONCEPTIONS¶
Collars eliminate tail upside — every dollar above K_c belongs to the call buyer. If a stock rallies through the call strike and never returns, the short call will be assigned and the position closed at K_c, locking out further gains. Early assignment risk spikes around ex-dividend dates: a deep-ITM short call may be exercised the day before the dividend to capture it. A collar is not a free lunch — the cost of protection is the surrendered upside, which is often the most valuable part of a long stock position. Volatility skew also matters: in equities, put implied volatility usually trades richer than call IV, so symmetric-distance collars require selling further OTM calls than the put distance to achieve zero cost.
| Risk | Detail |
|---|---|
| Upside surrender | Gains above K_c are forfeited entirely |
| Early assignment | Deep-ITM short calls may be exercised the day before ex-dividend to capture the dividend |
| Volatility skew | Put IV typically trades richer than call IV in equities — symmetric-distance collars require selling further OTM calls than the put distance to achieve zero cost |
| No free lunch | The cost of protection is surrendered upside, often the most valuable part of a long stock position |