IV Crush: When Volatility Collapses After Events
IV crush destroys option premium after events — why your correct direction trade can still lose on Nifty options.
Definition
IV crush is the sharp drop in implied volatility after a known event resolves — budget, RBI policy, election results, earnings. Premium deflates because uncertainty premium evaporates. Long option holders lose vega even if direction is partially right.
Long straddles are especially vulnerable — you need a move larger than implied to overcome crush plus theta.
Why Direction Is Not Enough
Buy a call before budget with IV at 18%. Nifty rises 0.5% — your thesis worked — but IV falls to 14% and premium drops. Delta gains fight vega losses. Many beginners experience this as 'the market is rigged'.
Pre-event IV is expensive by design. The market prices average expected move.
- Buy options after crush when IV normalises — cheaper entry
- Sell premium pre-event only with risk controls — gap risk
- Compare implied move to historical event moves
- Consider spreads to reduce vega exposure
Event Calendar Awareness
Study budget day and election day behaviour before risking capital. IV paths differ by event type.
If IV percentile is in top decile, long options face headwind regardless of chart beauty.
Frequently Asked Questions
- Can IV rise and crush still happen?
- Crush specifically means post-event IV drop. Pre-event IV often rises first.
- Does IV crush affect ITM options?
- Yes, but delta may offset more than OTM lottery tickets.
Key Takeaways
- IV crush = post-event volatility collapse.
- Long options need move larger than implied.
- Check IV level before buying pre-event.
Related Articles
- Straddle Strategy: Profiting from Volatility in Index OptionsLearn long and short straddles on Nifty and Bank Nifty — when to buy both call and put, sizing, and expiry-week considerations.
- 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.
- Budget Day Options: Volatility, Gaps, and Trading TacticsHow Nifty and Bank Nifty options typically behave on Union Budget day — IV expansion, straddle pricing, and post-announcement IV crush.