What it really means
When the market expects bigger future moves, options become more expensive. Vega measures that sensitivity.
Greeks
Vega
Vega measures how much an option price changes when implied volatility changes by 1%.
In one line Vega tells you volatility sensitivity.
Greek
How much volatility can change price.
Vega is larger in longer-dated options and often central to earnings trades and volatility strategies.
Quick example
If vega is 0.12, a 1-point rise in IV may add about $0.12 to the option price.
Why traders care
- Long options usually benefit when implied volatility rises.
- Short premium strategies often prefer volatility to contract.
- Vega matters a lot before earnings, macro events, and big announcements.
What beginners get wrong
- Buying options before earnings without realizing volatility is already expensive.
- Ignoring IV crush after major events.
- Thinking direction alone determines P&L.
Test Yourself
Quick Quiz
See how well you understand the term before moving on.
1 Vega of 0.12 means a 1% rise in IV will approximately:
2 Which options have the highest vega?
3 IV crush after earnings refers to: