Glossary term
Options Contract
An options contract gives its buyer the right, but not the obligation, to buy or sell an underlying asset at a set price within a defined period.
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What Is an Options Contract?
An options contract gives its buyer the right, but not the obligation, to buy or sell an underlying asset at a set price within a defined period. The seller, also called the writer, takes on the corresponding obligation if the buyer exercises the option.
The two basic types are calls and puts. A call gives the buyer the right to buy the underlying asset at the strike price. A put gives the buyer the right to sell the underlying asset at the strike price. Options can be used for speculation, income strategies, hedging, or risk management, but they are not simple substitutes for owning the underlying investment.
Key Takeaways
- An options contract is a derivative whose value depends partly on an underlying asset.
- Calls give the buyer the right to buy; puts give the buyer the right to sell.
- The buyer pays a premium, while the seller receives the premium and accepts obligations.
- Time, volatility, strike price, and the underlying price all affect option value.
The Parts of the Contract
Every listed options contract has terms that define what the buyer and seller are agreeing to. Those terms determine whether the option has value, how much risk each side has, and what has to happen before expiration for the trade to work.
Contract Feature | What It Means |
|---|---|
Underlying asset | The stock, ETF, index, or other asset the option references. |
Strike price | The price at which the buyer can buy or sell if the option is exercised. |
Expiration date | The date after which the option no longer has value. |
Premium | The price paid by the buyer and received by the seller. |
Buyer Rights and Seller Obligations
The buyer's risk is usually limited to the premium paid, plus transaction costs, when buying a standard call or put. The buyer can exercise the option, sell it, or let it expire. The seller's risk depends on the strategy. A covered call seller owns the underlying shares, while an uncovered call seller may face substantial or unlimited risk if the underlying price rises sharply.
Exercise style also matters. American-style options can generally be exercised before expiration, while European-style options can be exercised only at expiration. Many investors close their option position before expiration rather than exercise it.
Where Investors See Them
Options show up in brokerage platforms, risk-management strategies, structured products, employee compensation plans, and market commentary about volatility. A contract that looks inexpensive can still be risky if the odds of a favorable move are low or if time decay is working against the position.
Options can also change portfolio behavior in ways that are not obvious from the premium alone. They may add leverage, cap gains, create assignment risk, or expose an investor to volatility changes even when the underlying price barely moves.
The Bottom Line
An options contract is a time-limited right tied to an underlying asset. It can be useful for hedging or expressing a market view, but the payoff depends on the contract terms, price movement, volatility, and timing.