Chapter 19: The Collar

Book: Understanding Options 2E

Type: Chapter 19

Difficulty: Beginner

Reading time: 9 min

Core idea

A collar is a three-leg position: own the stock, sell an out-of-the-money call against it, and buy an out-of-the-money put to protect the downside. The call premium received helps pay for the put. The result is a stock position with a ceiling (the call strike) and a floor (the put strike) — a defined band of outcomes.

The zero-cost collar

When you choose strikes such that the call premium received equals (or exceeds) the put premium paid, the protection costs nothing out of pocket. This is the famous zero-cost collar — capital-preservation insurance for free, in exchange for surrendering upside above the call strike.

The trade-off in one sentence

You give up the chance to participate in a big rally above the call strike, in exchange for a hard floor that stops a big decline below the put strike. The collar is for investors who would rather sleep well than swing for the fences.

Why it matters

Covered calls alone are not protection

A covered call generates income but does almost nothing against a serious decline — a $3 premium does not offset a $20 drop in the stock. The protective put leg of the collar is what turns “income generation” into “actual downside defense.”

Built for capital preservation, not maximum gain

The collar is the right tool when the priority is not losing — retirement accounts, large concentrated positions, gains you cannot afford to give back. It is the wrong tool when you need the upside fully intact: every rally above the call strike is forfeited.

Easy to layer onto positions you already hold

You can collar a position you already own simply by adding the two option legs. No need to sell and rebuy the stock. That makes the collar a practical “panic button” when a position has run up and you suddenly want defensive protection without triggering a taxable sale.

Key takeaways

Key takeaways

• A collar = long stock + short OTM call + long OTM put — a band with a profit ceiling and a loss floor.
• The call premium can fully or partially finance the put — when it matches exactly, it's a zero-cost collar.
• Maximum gain = call strike minus stock cost plus net option credit; maximum loss = stock cost minus put strike minus net credit.
• Use the collar to protect gains on a stock that has run up, or to defend a position you cannot afford to lose.
• Both options are typically OTM — the call above current price, the put below — leaving a working range in the middle.
• Trade-off: you surrender unlimited upside in exchange for a defined floor. Capital preservation over capital growth.

Mental model

click to zoom

Collar payoff band — stock with defined ceiling and floor

Read it as: Three regions, three outcomes. Above the call strike you take maximum profit (the stock is called away). Between strikes you keep the stock and pocket whatever credit the option legs produced. Below the put strike the loss stops — every dollar the stock falls further is matched by a dollar the put gains.

Practical application

1. Start with stock you own. A collar layers onto an existing 100-share position (or buy 100 shares first if starting fresh).

2. Sell an OTM covered call. Choose a strike above the current price where you would be content to sell. Collect the premium.

3. Buy an OTM protective put. Choose a strike below the current price that represents the worst loss you will accept. Pay the premium.

4. Aim for zero cost. Adjust the strikes until the call premium roughly equals the put premium. A small net credit is ideal; a small net debit is acceptable insurance cost.

5. Match expirations. Both options should expire on the same date so the position unwinds cleanly. Monthly expirations are most liquid.

6. At expiration, let the math decide. Stock above call strike: shares are called away at the strike. Stock below put strike: sell the put for its gain (or exercise to sell the stock at the strike). Stock in between: both options expire and you start over.

Pick strikes you would actually trade at

Choose the call strike at a price where you would be genuinely happy to sell. Choose the put strike at a price where you genuinely want a floor. If either feels regrettable in advance, widen the band — or skip the collar entirely.

Example

Protecting a concentrated employer-stock position

You hold 100 shares of Acme Industrial at $52 (cost basis $40). You cannot afford to give back the gain but also cannot sell yet for tax reasons. You build a 60-day collar:

• Sell 1 Acme 55 call for $2.20 premium received ($220)
• Buy 1 Acme 50 put for $2.00 premium paid ($200)
• Net credit: $20

The three possible outcomes:

• Stock rallies to $58: Shares called away at $55. Stock gain: $300 (from $52 cost to $55 strike). Plus $20 net credit. Total profit: $320.
• Stock drifts to $53: Both options expire worthless. You keep the stock and the $20 credit. You can rebuild the collar next month.
• Stock plunges to $44: Put protects below $50. Stock loss: $200 (from $52 to $50). Net credit: $20. Total loss: about $180. Without the collar, the loss would have been $800.

In every scenario the collar narrowed the range from “anywhere” to “between -$180 and +$320.” That bounded distribution is the entire product.

Related lessons

Related

Chapter 18: Protective and Married Puts The put leg of the collar in isolation — what it costs and what it protects. Chapter 20: Credit and Debit Spreads Move from single-stock collars to pure multi-leg option spreads. Concept: Covered Call The income-generating short call that funds the collar's protective put.