A collar option strategy is a position that combines a long stock or ETF position, a long put and a short call. The put limits downside risk, while the call generates premium income and limits upside potential.
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For example, an investor who owns 100 shares of a stock trading at $100 could buy a $95 put and sell a $110 call with the same expiration date. The put creates a downside floor. The call creates an upside ceiling.
Collar Option Strategy at a Glance
| Feature | How It Works |
|---|---|
| Underlying position | Own the stock or ETF |
| Protective leg | Buy a put below the current market price |
| Income leg | Sell a call above the current market price |
| Downside risk | Limited below the put strike, subject to premiums and costs |
| Upside potential | Limited above the call strike |
| Typical outlook | Neutral to moderately bullish |
| Main purpose | Protect the position while reducing the cost of the hedge |
How Does a Collar Strategy Work?
A collar works by pairing stock ownership with two options that have different roles.
The long put gives the investor the right to sell the shares at the put strike. In the example above, the investor can sell the shares at $95, subject to the option terms and expiration date.
The short call gives the call buyer the right to purchase the shares at the call strike. If the stock rises above $110, the investor may have to sell the shares at approximately $110.
The strategy is called a collar because the put strike acts as a floor and the call strike acts as a ceiling.
What Happens at Expiration?
At expiration, the stock price determines which option, if any, has value.
| Stock Price at Expiration | Likely Result |
|---|---|
| Below $95 | The put can be exercised, allowing the shares to be sold at $95 |
| Between $95 and $110 | The stock gains or loses value within the two strike prices |
| Above $110 | The call may be assigned, requiring the shares to be sold at approximately $110 |
| Near either strike | Exercise, assignment and broker procedures require closer review |
The investor's total result also depends on the option premiums, stock cost, dividends, commissions, taxes and other transaction costs.
Why Sell a Call in a Collar?
Selling the call produces premium income that can offset some or all of the put premium.
Buying a put alone provides downside protection, but the premium can reduce the position's return. Selling a call lowers that cost, but the investor gives up gains above the call strike.
When the call premium equals the put premium, the position is often called a zero-cost collar. In this context, "zero cost" refers to the option premiums only. It does not mean the position has no economic cost or risk.
Collar Strategy Example
Assume an investor has the following position:
- Stock purchase price: $100
- Long $95 put
- Short $110 call
- Put premium: $3
- Call premium: $3
The premiums offset each other before fees and other costs.
At expiration:
- If the stock falls to $70, the investor can use the put to sell the shares at $95.
- If the stock remains at $100, both options may expire worthless and the investor continues to own the stock.
- If the stock rises to $125, the short call may require the shares to be sold at approximately $110.
- If the investor bought the stock below $100, the collar can help protect an unrealized gain.
The $95 put does not guarantee a $95 total return. The investor must also account for the net option premium, dividends, trading costs and original stock cost.
How Do You Calculate Collar Profit and Loss?
For a collar established when the stock is purchased, the approximate maximum gain is:
Call strike - stock purchase price - net premium paid
If the position produces a net credit, the credit increases the potential gain.
The approximate maximum loss is:
Stock purchase price - put strike + net premium paid
These calculations assume the investor holds the position through expiration. They exclude commissions, taxes and other costs.
The collar limits losses below the put strike during the option's life. It does not protect the position after the put expires. The investor must buy or roll another put to continue the protection.
What Are the Advantages of a Collar?
A collar can suit an investor who wants to keep a stock position but is concerned about a decline.
- Downside protection: The long put establishes a minimum sale price at the strike, subject to the premium and option terms.
- Lower hedging cost: The short call premium can help pay for the put.
- Continued ownership: The investor can keep the stock instead of selling it immediately.
- Defined price levels: The put and call strikes establish clear protection and upside levels.
- Protection for unrealized gains: The put can help protect an accumulated gain in the stock.
The strategy is most suitable when the investor is willing to sell the shares at the call strike in exchange for protection against a decline.
What Are the Disadvantages and Risks?
The main trade-off is the loss of upside above the short call strike.
Key risks include:
- Capped gains: Stock gains above the call strike are generally surrendered.
- Limited protection: The put protects only down to its strike and only until expiration.
- Assignment risk: The short call can be assigned before expiration, especially before the stock's ex-dividend date.
- Renewal cost: Continued protection requires another put after the existing one expires.
- Transaction costs: Bid-ask spreads, commissions, taxes and slippage can reduce returns.
- Management risk: Rolling either option can change the cost, protection level and upside ceiling.
- Tax consequences: Exercise or assignment can affect the timing and character of gains or losses.
Early assignment of the short call is possible at any time. It is often associated with the period before the stock goes ex-dividend. Mergers, takeovers, spin-offs and special dividends can also affect standard option terms and procedures.
Collar vs. Protective Put vs. Covered Call
| Strategy | Downside Protection | Upside Potential | Premium Cost or Income | Best Suited To |
|---|---|---|---|---|
| Protective put | Strong, down to the put strike | Retained | Usually costs a premium | Investors who want protection without capping gains |
| Covered call | None beyond the stock's value | Capped at the call strike | Generates premium income | Investors who accept downside risk in exchange for income |
| Collar | Limited to the put strike | Capped at the call strike | Call premium offsets some or all of the put cost | Investors who want lower-cost protection |
A protective put preserves upside but can be expensive. A covered call generates income but does not establish a downside floor. A collar combines the two positions and sits between them.
When Might an Investor Use a Collar?
An investor might consider a collar when:
- The stock position is concentrated.
- The investor has a substantial unrealized gain to protect.
- The investor expects limited upside during the option period.
- The investor is willing to sell the shares at the call strike.
- The investor wants protection at a lower upfront cost than a put alone.
- The investor wants temporary protection before a known financial obligation or risk period.
A collar is less suitable when the investor expects a large rally and wants to retain all potential gains.
What Is a Put Spread Collar?
A put spread collar uses more than one put strike. The investor typically buys one put for protection and sells another put at a lower strike to reduce the hedge's cost. The short put creates a lower level below which the investor is exposed to further losses.
This structure provides protection within a specific price range rather than a complete downside floor. It is more difficult to manage than a standard collar because the short put creates additional obligations.
Bottom Line
A collar fits an investor who wants to keep a stock or ETF position, can accept a capped sale price and values downside protection more than unlimited upside.
Before entering the trade, compare the put strike, call strike, expiration date and net premium with the price levels at which you would actually want to sell or continue holding the asset.