Guide · Reviewed 6 September 2026
Deep OTM puts trade at 2–3x higher implied volatility than ATM options. Market prices crash-protection premium, not statistical likelihood.
Implied volatility (IV) varies across strikes. OTM puts (crash protection) trade expensive because traders will pay for insurance during crashes. ATM options are "normal." This distortion creates profitable trades: sell expensive OTM puts, buy cheaper ATM puts (put spread).
Volatility skew visualization
Stock at $100. S&P 500 1-month options:
- $95 puts (5% OTM): IV 28%
- $100 ATM: IV 20%
- $105 calls (5% OTM): IV 20%
- $90 puts (10% OTM): IV 35%
Skew: OTM puts are expensive. Market pricing "crash insurance" at premium.
Why the skew exists
- Tail risk: 2008 showed +50% crashes happen (not just −5% wiggles).
- Portfolio hedging: Every fund manager buys OTM puts to hedge portfolios. Demand = higher IV.
- Volatility clustering: When stock drops 5%, next drop is more likely (not random). Traders price this.
Trading the skew: Put spread
Sell $95 put (IV 28%), Buy $90 put (IV 35%):
- Collect premium from selling $95 put: $2.50 (high IV).
- Pay premium for $90 put: $1.00 (even with higher IV, deeper OTM is cheaper).
- Net credit: $1.50.
- Max loss: Difference between strikes − credit = $5 − $1.50 = $3.50.
- Risk/reward: $1.50 gain on $3.50 risk (43% return if stock stays above $95).
Why this works: You're selling the expensive IV ($95 put) and hedging with cheaper-to-hedge ($90 put). Skew compression profits you.
Skew reversal during crashes
Normal day: $95 put IV 28%, $90 put IV 35% (skew exists).
During crash (stock drops to $92):
- $95 puts now ITM (much higher IV 40%+).
- $90 puts now ATM-ish (IV converges to 40%+).
- Skew flattens. Your hedge becomes valuable (limited loss).
Practical observation: VIX term structure
VIX is skewed too. Front-month contracts (fear now) have higher IV than next-month (fear later). Rolling forward captures skew decay.
Takeaway: IV skew isn't a coincidence—it's structural. Smart traders profit from selling expensive OTM premiums and hedging with puts that move more (in volatility terms) during crashes.