Glossary term
Put Option
A put option is a contract that gives the buyer the right, but not the obligation, to sell an underlying security at a set price within a specified period.
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What Is a Put Option?
A put option is a contract that gives the buyer the right, but not the obligation, to sell an underlying security at a set price within a specified period. That set price is called the strike price.
Puts are part of the broader world of options. Investors may use them to hedge downside risk, speculate on a decline, or create more complex option strategies.
Key Takeaways
- A put gives the buyer the right to sell the underlying asset at the strike price.
- The buyer pays a premium for that right.
- A put can rise in value when the underlying asset falls.
- Put buyers can lose the premium if the option expires worthless.
- Put sellers may face large losses if the underlying asset falls sharply.
How a Put Works
Suppose an investor buys a put option on a stock with a strike price of $50. If the stock falls below $50 before expiration, the put may become valuable because it gives the holder the right to sell at $50 even though the market price is lower.
If the stock stays above the strike price, the put may expire worthless. In that case, the buyer's loss is generally limited to the premium paid, before considering commissions, fees, and taxes.
Put Buyer Versus Put Seller
Position | What the position wants | Main risk |
|---|---|---|
Put buyer | The underlying asset falls or downside protection is needed | Losing the premium paid |
Put seller | The underlying asset stays above the strike price | Having to buy or settle exposure after a large decline |
Why Put Options Matter
Puts can be useful risk-management tools, but they are not free protection. The premium, expiration date, strike price, volatility, and liquidity all affect whether a put is practical.
They can also be misused. Buying puts repeatedly as a market-timing tool can become expensive, while selling puts without understanding the downside can create more risk than expected.
The Bottom Line
A put option gives the buyer the right to sell an asset at a set price before expiration. It can help hedge downside risk or express a bearish view, but the cost, timing, and risk of the strategy matter.