IV Crush
The collapse of implied volatility after events
What Is IV Crush?
IV crush is when the implied volatility of an option falls dramatically, typically after an anticipated event such as earnings, a product announcement or a Fed statement. Before the event, traders anticipate a large move and buy options, which drives implied volatility up. Option prices inflate because of that high IV. Once the event happens and gets "priced in", traders find that implied volatility does not hold at the levels being discounted. Implied volatility falls dramatically. Options that looked valuable before the event can lose 30-50% of their value purely because of the IV drop, even if the stock moved in the predicted direction. IV crush can be devastating for option buyers and extremely favourable for option sellers. It is one of the most important concepts to understand if you trade around major economic events or corporate announcements.
When IV Crush Happens
IV crush happens most dramatically around anticipated high-impact events. Corporate events such as quarterly earnings, product launches or merger announcements generate very high IV in the days beforehand. When the actual event is announced, IV collapses. Macroeconomic events such as Fed statements, employment reports or inflation data follow a similar pattern. The market anticipates a large move, IV rises, then the event happens and IV falls. An interesting pattern is that IV crush often occurs even if the event produced a surprise price move. For example, if the earnings report is terrible (price falls 10%) but everyone expected price to fall, IV can drop anyway. The reason is that the move happened — the uncertainty was resolved — so traders no longer demand expensive options. The exact timing of IV crush is hard to predict, but it generally occurs within minutes of the event announcement.
The Impact on Option Buyers
IV crush is terrible for option buyers because it reduces the value of their position even when they are right about direction. Imagine you buy a call expecting earnings to beat and the stock to rise 5%. Earnings are announced and the stock rises 5%, exactly as you expected. But because of IV crush, your call has lost value, not gained. You could be losing money even though you were right. This pattern surprises many novice traders. Option buyers around events must be aware that they need enough price movement not just to reach breakeven on the premium paid, but also to overcome the expected IV crush. A practical rule of thumb is that you need a move at least 1-1.5 times the move implied by IV to offset the crush. Many traders simply avoid buying options around events entirely, recognising that IV crush is too costly.
Opportunities for Sellers
IV crush is exactly what option sellers are looking for. If you sell an option with very high IV and IV crush follows, your position becomes profitable quickly. Sellers actively look for events where IV is inflated because IV crush is close to guaranteed. A common strategy is to sell a straddle (selling both a call and a put at the same strike) the day before an event, knowing that both options will lose value once IV crush occurs. Another variant is selling credit spreads: they capture less of the IV drop than a naked sale, because the purchased leg also loses vega, but they cap the loss if the move goes against you. Professionals actively speculate on when and how dramatic the crush will be, adjusting their short positions accordingly. Sellers should be aware, however, that although IV crush is likely, the direction of the price move remains uncertain. If price moves against you enough, you can still lose money despite a favourable crush.
Strategies Around IV Crush
Sophisticated traders develop strategies specifically to exploit IV crush. One is "selling volatility before events" — selling options when IV is high but before the event happens. Calendar spreads are the opposite case, and worth not confusing: by selling the near-dated option and buying the far-dated one, the long leg carries more vega than the short, so the position is net positive-vega and IV crush hurts it. A calendar is opened when you expect IV to rise, not to collapse. A short strangle (selling an OTM call and an OTM put) is a popular way to play IV crush, profiting if price stays relatively flat and IV falls. Ratio spreads let traders take asymmetric advantage of the crush while managing directional risk. Anyone who genuinely understands IV crush can turn the events that ruin beginners into profitable opportunities. That requires experience, an understanding of pricing models, and strict risk-management discipline. Traders who do not understand IV crush should avoid trading around events entirely.