Encyclopedia5 min read
Vega Greek: Sensitivity to Implied Volatility
How vega affects option premium when IV rises or falls — critical around events on Nifty options.
Definition
Vega measures premium change per 1% move in implied volatility. Long options are long vega — benefit from IV rise. Short options are short vega — hurt when IV expands.
Before budget or RBI, vega inflates premiums. After announcement, IV crush hits long vega hard even if direction right.
Event Trading
See implied volatility for beginner context.
Frequently Asked Questions
- Who is this guide for?
- Nifty and Bank Nifty option traders who want structured education around chain reading, OI, and risk — not signal tips.
- Can I trade from this article alone?
- Use it as education paired with live analysis on OptionTools. Paper trade or size down while validating ideas.
Key Takeaways
- Long options = long vega exposure.
- Event wins need direction AND IV path.
- Post-event crush is a separate risk from wrong direction.
Related Articles
- Implied Volatility (IV) Explained for Index OptionsWhat implied volatility means on the option chain, how IV rises before events, and why [IV crush](/learn/iv-crush) hurts buyers after news.
- IV Crush: When Volatility Collapses After EventsIV crush destroys option premium after events — why your correct direction trade can still lose on Nifty options.
- Greeks Explained: Delta, Gamma, Theta, and Vega for OptionsA practical introduction to option Greeks — how delta, gamma, theta, and vega affect Nifty and Bank Nifty positions in intraday trading.