Protective Collar

The protective collar strategy is a popular risk management tool among investors who want to protect their gains while limiting potential losses. It involves three key components: owning the underlying asset, purchasing an out-of-the-money (OTM) put option, and writing an OTM call option with the same expiration date. Mechanics:

Own the Underlying Asset

You must already own the stock or asset you want to protect. For example, you hold 100 shares of ABC Corporation, currently trading at $100 per share.

Purchase an OTM Put Option

Buy a put option with a strike price below the current market price of the stock. This put option acts as insurance, giving you the right to sell your shares at the strike price. In our example, you buy an ABC March 95 put option for $2 per share ($200). This means you can sell your shares at $95, regardless of how low the stock price falls.

Write an OTM Call Option

Sell a call option with a strike price above the current market price. This generates income (premium) but obligates you to sell your shares at the strike price if the option is exercised. In our example, you sell an ABC March 105 call option for $2 per share ($200), which fully pays for the put. If ABC’s stock price rises above $105, you must sell your shares at $105.

Equity collars are used by investors whose primary concern is the downside risk of a stock position. They are willing to place a cap on upside potential to limit their downside risk at little, and sometimes no cost. The primary benefit is the downside protection offered by the long put option. If ABC’s stock price falls below $95, your losses are limited because you can sell your shares at $95. The volatility reduction is arithmetic, not empirical: you have truncated both tails of the return distribution, so realized variance must fall.

Writing the call option generates premium income, which can offset the cost of purchasing the put option. This makes the protective collar a cost-effective strategy.

This strategy is particularly useful after substantial gains in the underlying asset. It allows you to lock in profits while still participating in some upside potential.

The cost you actually pay, and how to set the strikes. The trade-off is not a fee — it is the obligation to sell at the call strike ($105 here). If ABC runs to $140 you have forgone $35 per share, which will feel considerably worse than the $200 you would have spent on an unfunded put. Call this what it is: the collar is cheap in cash and expensive in regret, and the regret is unbounded on the upside while the cash saving is not.

Default to a zero-cost collar with strikes roughly 2% out-of-the-money on each side and a six-month tenor, and do not try to time the strike selection off market signals. That is the practical conclusion of El-Hassan, Hall and Tulunay’s comparison of collar construction methods,¹³⁹ which tested signal-driven strike selection against simple fixed-width rules. The signal-driven variants did not reliably beat the mechanical one, and their edge deteriorated in exactly the high-anxiety periods where you would most want the hedge to work. The mechanical rule is also the one you will still be following in year three, which matters more than a marginal backtest.

Note the asymmetry against a plain protective put: the put has a known maximum cost and no assignment risk, while the collar has near-zero cash cost and an open-ended opportunity cost. Choose the collar when the cash cost of puts is what is stopping you from hedging at all; choose the put when you genuinely expect to keep the upside.

Tax consequences. The premium you receive for writing the call is not income when you receive it — see section “Taxation of Equity Options”. It stays in suspense until the call lapses, is bought back, or is exercised, and only then takes its character. What does bite immediately is structural: stock plus a protective put plus a short call is a straddle under IRC §1092, and unless the call qualifies as a qualified covered call under IRC §1092(c)(4) the loss-deferral and holding-period rules apply to the whole package. If the collar sits over a large appreciated position, add IRC §1259 constructive-sale exposure to the list — covered in section “Asymmetric Tail Hedging for Concentrated Equity”, which is where collars on concentrated stock belong.

Let’s revisit our example with ABC Corporation:

Initial Position

Long 100 shares of ABC at $100.

Put Option

Buy ABC March 95 put for $2 per share (total cost = $200).

Call Option

Sell ABC March 105 call for $2 per share (total premium = $200).

In this scenario, the net cost of the protective collar is zero because the premium from the call option offsets the cost of the put option.

If ABC falls to $90

You can exercise the put option and sell your shares at $95, limiting your loss to $5 per share.

If ABC rises to $110

You must sell your shares at $105, capping your gain but still locking in a $5 per share profit. If, after a few months, the stock price increases to $120, you might decide to adjust your collar by buying back the call option and selling another with a higher strike price, say $130, to maintain upside potential while still protecting your investment.

The collar earns its place for one specific reader: someone in a high bracket sitting on a large embedded gain who cannot sell without a punishing tax bill. For that person the collar buys time at almost no cash cost. For anyone who could simply sell and diversify, it is an expensive way to avoid making a decision.