# American Option

*Derivatives & Options — Finicade finance glossary*

An option you can exercise any time up to expiry, not just on the final day. That flexibility makes it worth at least as much as an otherwise-identical European option — and trickier to price.

**Also known as:** american option, american on a tree

**Related terms:** [European Option](https://finicade.com/glossary/european-option), [Early Exercise](https://finicade.com/glossary/early-exercise), [Option](https://finicade.com/glossary/option)

**Taught in:** Quant Quest — American & Exotic Options

Source: https://finicade.com/glossary/american-options