Volatility Crush
Learn what volatility crush is, when it happens, and how to profit from the predictable collapse of implied volatility.
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What Is Volatility Crush
Volatility crush is the rapid decline of implied volatility after an anticipated event. Before the event, uncertainty drives IV higher. After the event, uncertainty is resolved and IV collapses — often within hours.
This is not a theory. It is one of the most reliable, repeatable phenomena in options trading. It happens after every earnings announcement, every Fed meeting, every election, every binary event. If you understand it, you can build trades that profit purely from this IV contraction.
The Mechanics
Option prices are driven by five factors: stock price, strike price, time to expiration, interest rates, and implied volatility. Of these, IV is the most variable and the one you can trade most directly.
When IV drops, all options lose value — calls and puts alike. A 30% drop in IV can reduce an option's price by 20-40%, even if the stock does not move at all.
Example — GOOGL earnings:
- Before earnings: GOOGL at $170, IV at 52%
- GOOGL $170 straddle (ATM call + ATM put) priced at $12.00
- Earnings announced: GOOGL moves to $173 (a 1.8% move)
- After earnings: IV drops to 28%
- The $170 straddle is now worth $6.50
The stock moved $3 higher, but the straddle lost $5.50 in value. The buyer of the straddle lost money despite being right about direction. The seller of the straddle pocketed $5.50 per share — $550 per straddle — because the crush was more powerful than the stock move.
Where Volatility Crush Happens
Earnings announcements. The biggest and most frequent crush events. Individual stock IV can drop 30-60% overnight. This happens four times a year per stock, giving you dozens of opportunities each earnings season.
Federal Reserve meetings. FOMC announcements (8 per year) cause SPX IV to build up and then crush after the statement and press conference. The crush is usually smaller than earnings (10-20% IV drop) but very consistent.
Economic data releases. CPI, jobs reports, GDP — these cause temporary IV expansion in index options. The crush comes within hours of the data release.
Elections and referendums. Before the 2020 election, SPX IV spiked above 35. The week after, it crushed below 25. Similar patterns around Brexit and other political events.
Biotech FDA decisions. The most extreme crushes happen in biotech. IV can go from 40% to 200% before an FDA ruling and crash back to 40% the next day. These are extremely high-risk but demonstrate the crush principle at its most dramatic.
How to Trade the Crush
Strategy 1: Sell Iron Condors Before Events
The most common crush trade. Sell an iron condor 1-2 days before the event. The inflated IV means you collect fat premium. After the event, IV crushes and the iron condor loses value rapidly — you buy it back for cheap.
Setup on AMZN before earnings:
- AMZN at $185, IV at 48%
- Sell $175/$170 put spread, sell $195/$200 call spread
- Collect $3.80 per iron condor ($380)
- After earnings: AMZN at $188, IV drops to 26%
- Iron condor now worth $0.90
- Profit: $2.90 per contract ($290)
Strategy 2: Calendar Spreads
Buy a longer-dated option and sell a shorter-dated option at the same strike. The short option (which has higher IV due to the upcoming event) loses value faster during the crush. The long option (less affected by the event) retains more value.
Example: Buy NFLX 45-DTE $600 call. Sell NFLX 7-DTE $600 call (which expires right after earnings). The short call gets crushed. The long call barely moves. The spread widens in your favor.
Strategy 3: Diagonal Spreads
Similar to calendars but with different strikes. Buy a longer-dated option at one strike and sell a shorter-dated option at a different strike. This gives you directional bias plus crush exposure.
Sizing Crush Trades
Crush trades are event-driven, and events can produce surprises. NFLX can drop 20% on a bad earnings report despite low expectations. Size these trades at 1-2% of your account maximum risk per trade. Even though the crush is reliable, the magnitude of the stock move is not.
The Crush Is Already Priced In (Sort Of)
Smart traders ask: if everyone knows IV will crush after earnings, why is it not already priced in?
It partially is. Earnings-week options are priced with higher IV precisely because the crush is expected. But the actual crush often exceeds what is priced in for two reasons:
- Hedging demand. Institutional investors buy puts for protection regardless of price. This structural demand inflates IV beyond fair value.
- Retail speculation. Retail traders buy calls hoping for a post-earnings pop. This additional demand further inflates IV.
The result: even after accounting for the expected crush, sellers of pre-earnings options have a statistical edge. Not on every trade — but over dozens of earnings cycles, the overpricing of event IV is real and tradeable.
The key is not to over-leverage. The crush is consistent, but the occasional gap move will test you. Treat crush trades as a high-probability supplement to your core strategy, not as your entire approach.