IV Crush Timing: Why Options Lose Value After Earnings
"I bought calls before earnings, stock went up 5%, calls lost money. What happened?" IV crush — sudden collapse of implied volatility after uncertainty resolves.
IV Expansion Before Earnings
Days leading to earnings announcement: IV rises substantially. Market prices uncertainty of binary event.
Typical patterns:
- 2 weeks before: moderate elevation (10-20% above baseline)
- 1 week before: substantial elevation (25-50% above baseline)
- Day of announcement: peak elevation (50-100%+ above baseline)
Makes options more expensive. $2.00 call three weeks before earnings might cost $3.50 day before earnings even if stock hasn't moved.
IV Crush After Earnings
Earnings announced → uncertainty resolved. Whether news is good, bad, or neutral, specific uncertainty about "what will earnings show" is gone. IV collapses toward baseline.
Typical patterns:
- Within 1-2 hours after: 60-80% of elevation gone
- End of first trading day: 85-95% gone
- 1-2 days later: back to near-baseline
Option value lost from IV collapse often exceeds value gained from favorable price moves. 5% stock move might add $1 intrinsic value, but IV collapse removes $2 extrinsic. Net: option loses value even though you were right.
Expected Move Math
Expected move around earnings calculated from ATM option premiums. ATM straddle = market's expected move either direction.
Example: SPY at $500. ATM straddle for 1-day earnings = $10. Expected move: ~$10 either direction.
For options to profit, stock must move more than expected move. Equal movement = approximately breakeven. Less movement = IV crush dominates.
Research shows stocks move more than expected ~50-55% of time. Not substantially different from coin flip.
Why Buying Calls Before Earnings Usually Loses
- Stock moves more than expected ~50% of time
- Transaction costs reduce breakeven threshold
- Occasional large moves provide upside
- Net expected value: approximately breakeven to slightly negative
Strategy requires significant edge from stock selection to overcome inherent IV crush headwind.
Strategies That Benefit From IV Crush
Short straddles. Collects maximum IV crush. Requires move less than expected. Dangerous if large move either direction.
Short strangles. OTM equivalent of straddle. Buffer against moderate moves, still exposed to large.
Iron condors on earnings. OTM credit spreads above and below. Collects IV crush with defined max loss.
Calendar spreads. Sell short-dated (hit by crush), buy longer-dated (less affected). Benefits from crush while maintaining directional exposure.
Earnings jade lizard. Specific structure designed around earnings dynamics.
Mixed research results. Can be profitable on average but suffer periodic large losses. Position sizing critical.
Specific Risks
Gap risk. Stocks can gap 10-30%. Short strangle at 15% expected move disaster when stock gaps 25%.
Pin risk. Stock pins exactly at short strike on expiration.
Liquidity risk. Bid-ask spreads widen during IV expansion. Closing costs more.
Dividend risk. For stocks with ex-dividend near earnings.
Earnings short premium should be sized smaller than other strategies.
Research-Supported Framework
Avoid buying premium before earnings in most cases. IV crush typically dominates.
Short premium can work with discipline. Small sizing, systematic entry/exit, acceptance of occasional large losses.
Calendar spreads balance exposures. Benefits from crush while maintaining directional exposure.
Avoid earnings for non-earnings strategies. Credit spreads/iron condors on individual stocks should close before earnings.
Index earnings-adjacent plays. Less dramatic IV crush than individual stocks.
Successful earnings options strategies require specific understanding of volatility dynamics and disciplined execution.
