A protective put is insurance for shares you own. You buy a put option that lets you sell your stock at a set price no matter how far it falls, and you pay a premium for that right. The cost is real and it recurs, so the useful question is not “does it protect me?” (it does) but “is the protection worth the price?” This guide shows how to work that out with real numbers.
What is a protective put?
A protective put, sometimes called a married put when bought together with the shares, combines:
- Stock you own, at least 100 shares per contract.
- A long put on the same stock. The put gives you the right, not the obligation, to sell 100 shares at the strike price until it expires.
If the stock falls below the strike, the put gains value as the stock loses it, which offsets the loss. If the stock rises, the put expires worthless and you keep the full gain, less what you paid for the put.
A worked example
You own 100 shares at $100. You buy one 60-day $95 put for $2.50, which costs $250.
| Stock at expiration | Value of the shares | Put payoff | Net result (after the $250 premium) |
|---|---|---|---|
| $120 | +$2,000 | $0 | +$1,750 |
| $102.50 | +$250 | $0 | $0 (breakeven) |
| $100 | $0 | $0 | −$250 |
| $95 | −$500 | $0 | −$750 |
| $80 | −$2,000 | +$1,500 | −$750 |
| $50 | −$5,000 | +$4,500 | −$750 |
Three numbers define it:
- Maximum loss: (stock price − strike + premium) × 100 = ($100 − $95 + $2.50) × 100 = $750, or 7.5% of the position, no matter how far the stock falls.
- Breakeven: stock price + premium = $102.50. The stock has to rise 2.5% just to pay for the insurance.
- Maximum profit: unlimited, as with owning the shares, less the premium.
The $5 gap between the stock price and the $95 strike works like an insurance deductible. You absorb the first 5% of a decline, and the put covers what comes after.
Choosing the strike and expiration
Every choice trades cost against protection.
- Strike closer to the stock price (at the money) gives more protection and costs more.
- Strike further below (out of the money) costs less but leaves a bigger deductible.
- Longer expirations protect for longer and cost more in total, though less per month.
- Shorter expirations are cheaper per contract but must be bought again, and the premiums add up.
The cost of insurance is a recurring expense
The put in the example costs 2.5% of the stock’s value for 60 days. If you roll that protection forward six times a year, you spend about 15% of the position’s value on puts, and the stock has to outperform that just for you to break even. Even if you buy it four times a year at the same price, that is about 10%.
This is why continuous protective puts rarely make sense as a permanent holding. They make the most sense when you have a specific reason: an event coming up, a large gain you do not want to sell yet because of taxes, or a concentrated position you cannot reduce right now. For the broader picture of hedging after big moves, see what to do after a stock market run-up and what to do when your portfolio is down 20%.
Protective put vs stop-loss vs collar
- Stop-loss order. Free to place, but it sells at the next available price, which can be far below your stop if the stock gaps down overnight. A put guarantees the strike price (for the contract’s life) regardless of gaps.
- Collar. You pay for the put partly or fully by selling a call, which also caps your upside. Cheaper, but you give up gains. See protective put vs collar and the collar 101 guide.
- Selling some shares. The simplest hedge is a smaller position. Compare it with a put before assuming you need options.
Common mistakes
- Buying protection after the drop. Put prices rise when volatility and fear do. Insurance is cheapest when it feels least necessary.
- Hedging with too short an expiration and finding out the put expired just before the decline.
- Forgetting the premium is a certain loss. If the stock stays flat or rises, the put is gone.
- Under-sizing the hedge. One contract covers 100 shares; ten contracts of protection on 1,000 shares is not “a little” protection.
- Exercising a put that still has time value. If you want out of the shares, selling the put and the shares separately usually captures more than exercising, because exercising gives up whatever time value the put has left.
Frequently asked questions
Does a protective put guarantee I will not lose money? No. It caps the loss at a known amount. In the example the cap is $750 per 100 shares.
Which strike should I choose? The one where the maximum loss is a number you can live with and the premium is a cost you can afford. Calculate both before buying.
Can I use it on an ETF or index? Yes, and many people use index puts or ETF puts such as SPY or QQQ puts to hedge a diversified portfolio. The match is imperfect unless your holdings track the index.
To compare the payoff with other strategies, use the options profit calculator, and read the protective put 101 guide for the step-by-step version.
Educational use only. Examples are hypothetical and ignore taxes and fees. This is not advice to buy or sell any security.