What are options?
A beginner's guide to options contracts — calls, puts, strike, premium and how they actually work.
What is an option?
An option is a financial contract that gives the buyer the right, but not the obligation, to buy or sell an underlying asset (like a stock, ETF, or index) at a specific price — the strike price — before a set expiration date.
Options are derivatives: their value is derived from that underlying asset.
Why people use options
Options are flexible. The main reasons traders use them:
- Hedging — protect a portfolio against losses by locking in a price.
- Speculation — profit from a market move with less capital than buying or shorting the underlying outright.
- Leverage — control a larger amount of an asset with a smaller investment.
- Income — selling options generates income through the premium collected.
Calls and puts
There are two basic types of options.
Call options
A call gives the buyer the right to buy the underlying asset at the strike price. It's typically used when you expect the price to rise.
Example: a call on a stock with a $50 strike lets you buy the stock at $50 — no matter how high its market price climbs before expiration.
Put options
A put gives the buyer the right to sell the underlying asset at the strike price. It's typically used when you expect the price to fall.
Example: a put on a stock with a $50 strike lets you sell the stock at $50 — even if its market price drops well below that before expiration.
The parts of a contract
Every options contract has three key components:
- Strike price — the agreed price at which the asset can be bought (calls) or sold (puts).
- Expiration date — the last date the option can be exercised. Options lose value as expiration nears, a phenomenon called time decay.
- Premium — the price the buyer pays the seller (the writer) for the rights the option provides.
A worked example
Suppose stock XYZ is trading at $100.
Call: you buy a call with a $105 strike for a $3 premium. If XYZ rises to $110 before expiration, you can exercise to buy at $105 and sell at $110 — a $2 profit ($5 gain minus the $3 premium).
Put: you buy a put with a $95 strike for a $2 premium. If XYZ falls to $90, you can sell at $95 — a $3 profit ($5 gain minus the $2 premium).
Final thoughts
Options are versatile instruments, but they carry real risk — especially for beginners. Understand the components of a contract and what each one does before putting money to work.
With these fundamentals in hand, you'll be far better equipped to read the options flow and follow what the smart money is doing.
Educational content — not financial advice.