Protective Put at a glance
| Construction | Buy 100 shares of stock and buy 1 put one strike below the money (out of the money) in the front month expiration. |
|---|---|
| Outlook | Bullish |
| Volatility view | Wants rising IV |
| Max profit | Unlimited. |
| Max loss | Stock purchase price minus put strike plus put premium, times 100. |
| Breakeven | Stock purchase price plus put premium per share. |
| Experience level | Beginner |
| Also called | Married put, Stock insurance |
How a protective put works
The put works like an insurance policy on your shares. You pay a premium, and in exchange you can sell the stock at the strike no matter how far it falls before expiration. The gap between the stock price and the strike acts like a deductible: losses down to the strike are yours, and losses below it are covered. When the put is bought on the same day as the stock, traders call it a married put; when it is added to shares already held, it is usually called a protective put.
At expiration the payoff has a floor on the left and an upward slope on the right. Below the strike, total value stops falling, and your maximum loss is the drop from your purchase price to the strike plus the put premium. Above the strike, the put expires worthless and you keep every dollar of gain, minus the premium. The shape mirrors a long call, which is why put call parity treats stock plus a put as a synthetic call.
Before expiration, the put's value responds to the stock, time and volatility. Time decay is the ongoing cost of the hedge, and buying fresh protection every month adds up over a year. Implied volatility usually rises when stocks fall, so the put tends to gain more than its delta alone suggests in a selloff. Buying protection while volatility is low makes it cheaper, and buying after a crash usually makes it expensive.
Protective Put example with real numbers
With the stock at $100, implied volatility at 30%, a 4.1% risk free rate and no dividend, you would buy 100 shares at $100.00, buy 1 97.5 put (32 days) at $2.27. That is a net debit of $10,227. At expiration a maximum profit of unlimited and a maximum loss of $477, with a breakeven at $102.27. The lognormal chance of profit is 40%.
These are theoretical American option prices from the Bjerksund and Stensland model, not live quotes. Load any ticker in the protective put calculator above to run the same math on real market prices.
When to use a protective put
- You hold shares you want to keep but worry about a sharp decline before a known event.
- You want to keep unlimited upside while defining a hard maximum loss.
- You want to protect an unrealized gain without selling the shares.
- You are opening a new stock position and want defined risk from day one.
Max profit, max loss and breakeven
Maximum profit
Unlimited. Profit at expiration equals stock price minus stock purchase price minus put premium, times 100, with no cap as the stock rises.
Maximum loss
Stock purchase price minus put strike plus put premium, times 100. This is the most you can lose however far the stock falls before expiration.
Breakeven
Stock purchase price plus put premium per share. The stock must rise by the cost of the put for the combined position to break even at expiration.
Protective Put Greeks
- Delta: Delta is positive and below one per share, because the put's negative delta offsets part of the stock. As the stock falls toward the strike, net delta shrinks and the hedge takes over.
- Gamma: Gamma is positive, coming from the long put. Your exposure falls as the stock drops and rises as it climbs, which is the convex profile insurance should have.
- Theta: Theta is negative. The put loses time value daily, and that decay is the running cost of keeping protection in place.
- Vega: Vega is positive. Rising implied volatility increases the value of your protection, which tends to happen during market stress.
See the live numbers for your position in the Greeks tab of the calculator, or explore a single option in the options Greeks calculator.
Early exercise and assignment risk
Because the put is American style, you can exercise it on any business day to sell your shares at the strike. That is useful if you need to exit, but exercising throws away any time value left in the put. It is usually better to sell the put and the stock separately, or to keep both if you still want the position. Exercise makes the most sense when the put is deep in the money with little time value and the interest on the sale proceeds outweighs what remains.
Dividends matter because you own the shares. You receive dividends while you hold the stock, and the expected drop on each ex dividend date is already built into the put's price, which makes protection on high dividend stocks cost more. If you plan to exercise an in the money put, waiting until after the ex date lets you collect the dividend first. At expiration an in the money put is exercised automatically and your shares are sold, so sell the put before the close if you want to keep the stock.
The calculator's Early exercise risk tab flags short legs that are likely to be assigned. For a single option, use the early exercise calculator or read how early exercise and assignment work.
Pros and cons
Pros
- Hard floor on losses while keeping unlimited upside.
- Lets you stay invested through uncertain events instead of selling.
- Gains from rising volatility during selloffs, when protection matters most.
- Simple to set up and adjust at a low options approval level.
Cons
- The premium is a recurring cost that drags on returns when the stock is calm or rising.
- The deductible between the stock price and the strike is still yours to lose.
- Protection expires, and rolling it month after month adds up.
- Puts are often priced richly because of volatility skew.
How to manage a protective put
- Choose the strike by the loss you can tolerate and the expiration by how long you need cover.
- Roll the put up after a rally to lock in more of the gain, or out in time as expiration nears.
- Sell a call against the shares to fund the put, which turns the position into a collar.
- After a sharp decline, consider selling the put to realize its value and buying a lower strike put to keep some protection.
Protective Put FAQ
How does a protective put work?
A protective put gives you the right to sell your shares at the strike, so losses below that price are offset by the put's gain. You pay a premium for this protection, which is your cost if the stock does not fall. Above the strike you keep all of the stock's upside, minus the premium.
Protective put vs collar: what is the difference?
A protective put buys a put and keeps unlimited upside, while a collar also sells a call to pay for the put and caps the upside. The collar costs less, sometimes nothing, but gives up gains above the call strike. The protective put costs more and keeps the stock's full upside.
What is a married put?
A married put is a protective put bought at the same time as the shares it protects. Its payoff is identical to a protective put added later. The name only describes when the put was purchased.
What happens to a protective put at expiration?
At expiration, an in the money protective put is exercised automatically, which sells your shares at the strike. An out of the money put expires worthless and you keep the shares. To keep the stock while capturing the put's value, sell the put before the close on expiration day.
Related strategies
Collar
A collar is a position that owns 100 shares of stock, buys a protective put below the market and sells a covered call above it.
Long Call
A long call is the purchase of a single call option, which gives you the right to buy 100 shares at the strike price on or before expiration.
Long Put
A long put is the purchase of a single put option, which gives you the right to sell 100 shares at the strike price on or before expiration.
Covered Call
A covered call is a position that owns 100 shares of stock and sells one call option against them to collect premium.
Educational tool, not financial advice. Calculations are theoretical and depend on your inputs; real fills, fees, early assignment and dividends can change results. Options involve risk and are not suitable for every investor.