Stock Market Glossary
Vega
Option measure for sensitivity to implied volatility.
In brief: option/">Option measure for sensitivity to implied volatility.
Meaning in practice
Vega shows how strongly the option price reacts to changes in the expected fluctuation. Long maturities and at-the-money options usually have high vega. Whoever buys options often also buys volatility; Whoever sells them is short vega.
Context for investors and traders
For traders, this term is most useful when preparing and executing an order. Its meaning depends on the venue, liquidity, time frame and order type. A single reading is not a reliable buy or sell decision.
How to use this in practice
Use the term first to describe the situation and add verifiable data: time frame, benchmark, costs and liquidity. Only then does it become an assessment that can be connected to an investment objective and risk budget.
What to keep in mind
Avoid false precision. Many market terms describe probabilities or historical patterns; they neither guarantee a return nor replace the review of a specific security.
