Collar Option Strategy: Floor and Cap for Long Stock

Key Takeaways

• Collar option strategy is long stock plus long put at Kp plus short call at Kc; the sold call premium offsets some or all of the put cost.
• A zero-cost collar buys a 92-strike put for $2 and sells a 110-strike call for $2 on $100 stock, no cash outlay, but upside capped at $110.
• A common mistake: treating zero-cost collars as truly free, the sold call upside is a real economic cost in a strong bull year.
• Collars are the standard tool for hedging concentrated positions without triggering a taxable sale of the appreciated stock.

What It Is

A collar has three legs: 100 long shares, one long put at a strike below the current price, and one short call at a strike above it. Both options typically share the same expiration. The long put sets the minimum exit price, the short call sets the maximum exit price, and the premium from the call offsets the premium paid for the put.

A zero-cost collar is the special case where the call premium exactly pays for the put. You give up equal amounts of upside to cover the downside insurance, and the hedge costs nothing out of pocket.

The Intuition

Protective puts work, but they are not cheap. A collar solves the cost problem the way a homeowner might fund a disaster policy by giving up the right to flip the house at a profit above some price. You still own the stock for ordinary movement, you just cannot benefit beyond a line you set in advance.

Collars are popular for concentrated positions. An executive with a large block of restricted stock, an investor sitting on a big unrealised gain, or a fund with a single outsized holding will often collar rather than sell, because a collar removes tail risk without triggering the capital gain that an outright sale would. The strategy is also widely used around known event risks such as earnings or litigation windows.

How It Works

Let S be the stock price, Kp the put strike, Kc the call strike, C the cost basis, and N the net premium (put premium paid minus call premium received). At expiration:

P&L per share = min(Kc, max(Kp, S)) - C - N
breakeven     = C + N
max profit    = Kc - C - N           (if S >= Kc)
max loss      = Kp - C - N           (if S <= Kp)

The payoff is flat below Kp, slopes one-for-one with the stock between Kp and Kc, and flat again above Kc. The investor has converted an open-ended position into a defined-risk one in exchange for giving up moves outside the two strikes. The width Kc minus Kp is effectively the range of outcomes you are still exposed to.

Strike selection is the main design choice. A tight collar near the current price locks in a result but concedes most future performance. A wide collar leaves room for the stock to move but offers less protection and less premium relief. The OIC's collar research materials show how small strike shifts change both the cost and the shape of the payoff.

Worked Example

You own 100 shares of a stock at a cost basis of $95. The stock trades at $100. You want to hold through an uncertain quarter without risking more than 8 percent and you are willing to cap the upside at 10 percent.

You buy a 92-strike put for $2 and sell a 110-strike call for $2. The net cost is zero.

Three outcomes at expiration:

• Stock closes at $85. Without the collar you would lose $15 per share from cost basis. You exercise the put at $92, so your effective exit is $92. Loss per share is $95 minus $92, or $3.
• Stock closes at $100. Both options expire worthless. You still hold the stock. No gain, no loss from the hedge, and $5 per share unrealised on the underlying.
• Stock closes at $120. The short call is assigned. You deliver shares at $110. Profit per share is $110 minus $95, or $15. You gave up the extra $10 per share above $110.

Common Mistakes

1. Collaring for free and forgetting the opportunity cost. Zero-cost collars feel free because no premium changes hands, but the sold upside is a real economic cost. In a strong bull year, the cap can easily be worth more than the put you bought. Free in cash is not free in return.

2. Mixing expirations on the two legs. Some investors buy a long-dated put and sell shorter-dated calls against it to collect premium more often. This is no longer a pure collar, it is a diagonal with a short-call overlay and extra assignment risk. It can work, but it has a different payoff and different risks than a plain collar, and should be treated as such.

3. Setting strikes around today's price rather than cost basis. A collar centred at the current price might lock a loss if the stock is below your cost. If the short call is below your cost, assignment crystallises the loss. Design the strikes around where a good and a bad outcome sit for your actual position.

4. Ignoring early assignment on the short call. American-style calls can be assigned before expiration, most commonly the day before an ex-dividend date when the call is deep in the money. An unexpected assignment turns the collar into a simple long put position on cash, which is rarely the intended exposure.

Frequently Asked Questions

Q: What is a collar option strategy in simple terms? You own shares and simultaneously buy a downside put and sell an upside call. The put protects you below its strike, the call limits your gains above its strike, and the call premium offsets the cost of the put.

Q: How does the collar strategy affect investment decisions? It converts an open position into a defined outcome box. Investors with large unrealised gains or concentrated single-stock exposure use collars to lock in most of their net worth while deferring the tax event that a sale would trigger.

Q: What is a real-world example of the collar strategy? You own 100 shares at a $95 cost basis trading at $100. You buy a 92-strike put for $2 and sell a 110-strike call for $2. Stock drops to $85: you exit at $92, losing $3 per share instead of $10. Stock rises to $120: you deliver at $110 for a $15 per share gain.

Q: How can investors choose collar strikes effectively? Design the strikes around what counts as a good or bad outcome for your specific cost basis, not around the current market price. Set the put floor at the maximum loss you can accept and the call cap at the minimum profit that satisfies your target.

Q: How is the collar different from a covered call alone? A covered call caps upside without protecting downside; the stock can still fall to zero with only the small premium as a cushion. The collar adds a put floor to eliminate the open-ended downside risk at the cost of selling more upside.

Sources

1. Options Industry Council. "Collar (Protective Collar)." https://www.optionseducation.org/strategies/all-strategies/collar-protective-collar
2. Options Industry Council. "Risk Mitigating Collar Strategy." https://www.optionseducation.org/getmedia/60c7d2e2-4ab5-47af-a742-a20abb4b2f9d/oic-collar-qqq_030222-phone-update.pdf
3. Cboe Options Institute. "Options 101." https://www.cboe.com/optionsinstitute/options_basics/options_101/
4. Options Clearing Corporation. "Characteristics and Risks of Standardized Options." https://www.theocc.com/company-information/documents-and-archives/options-disclosure-document

Disclaimer

This article is educational content only and is not financial advice. Nothing here is a recommendation to buy, sell, or hold any security. Consult a licensed advisor before making investment decisions.