Options Basics
What Are Options?
A plain-English explanation of options contracts, rights, obligations, premiums and expiration. Includes a worked example, risks and primary sources.
An option is a time-limited contract tied to an underlying security. A call gives its buyer the right to buy, while a put gives its buyer the right to sell, at a stated strike price. The seller accepts the corresponding obligation and receives a premium for doing so.
Primary references: Investor.gov: An Introduction to Options · FINRA: Options — contracts, risks and Greeks
Definition and mechanics
Standard U.S. equity and ETF options commonly represent 100 shares. The buyer pays a premium for a right; the seller collects that premium in exchange for an obligation if assigned. Contracts can usually be closed before expiration rather than exercised.
How to evaluate it
Identify the holder, writer, underlying security, contract multiplier, strike, expiration and exercise style before evaluating any option. Then compare the premium with the maximum loss, assignment obligation and settlement outcome. Broker approval levels and contract specifications can change what is practical even when the basic payoff is clear.
Worked example
A $50 call bought for $2 costs $200 before fees because the standard multiplier is 100. It gives the buyer the right to buy 100 shares at $50 before or at expiration, subject to the contract style.
Risks and limitations
- An option can expire worthless, while some short-option positions can create substantial or theoretically unlimited loss.
- Options involve risk and can lose part or all of the capital committed. Multi-leg positions also introduce execution, assignment and management complexity.
Common misconception
Reality check
Options are not automatically leveraged bets that must be held to expiration; they are contracts that can often be closed earlier.
Written by Philip Fowdar
Founder and editor, Options Matrix Pro
Philip founded Options Matrix Pro after building a repeatable way to compare options income opportunities across a watchlist. He writes and edits from the experience of designing, testing and using the product.
Frequently asked questions
What is an option in stock trading?
An option is a time-limited contract tied to an underlying security. A call gives its buyer the right to buy, while a put gives its buyer the right to sell, at a stated strike price. The seller accepts the corresponding obligation and receives a premium for doing so.
What is the most important limitation of what are options??
An option can expire worthless, while some short-option positions can create substantial or theoretically unlimited loss.
Sources
Verified July 16, 2026
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