Plain-English definitions, reviewed by an independent investor

Options

Options are contracts giving the right, not the obligation, to buy or sell a stock at a set price before a date.

Options are contracts giving the right, not the obligation, to buy or sell a stock at a set price before a date.

(Premium buys a right; strike and expiry define it)

Why it matters

They offer leveraged bets and income strategies beyond owning shares.

Common confusion

Time decay erodes value daily; most retail options expire worthless.

Definitions reviewed by the Investing Glossary editorial team.

Frequently Asked Questions

Call vs put?

Calls gain when price rises, puts when it falls.

Why do options lose value?

Time decay and falling volatility shrink the premium even if the stock sits still.

Related