Basics
American Option
Option exercisable anytime before expiration
What is American Option?
American Option An option that can be exercised at any time before expiration. Most stock options in the US are American-style.
Complete Definition
An option that can be exercised at any time before expiration. Most stock options in the US are American-style.
Example
You hold an AAPL call that expires in 30 days. As an American option, you can exercise it today if AAPL spikes.
Related Terms
AV
Written by
ApexVol Research Team
Quantitative options research
All calculations use live institutional-grade data — the same source used by professional volatility desks.
RS
Technical reviewer
Ryan Silk, ApexVol Founder
Reviewed for technical accuracy
10+ years trading options. Built ApexVol's pricing engine, Greeks model, and IV-rank methodology.
This guide is updated as market conditions and institutional data change. Last revised 2026-05-12.
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