Volatility Crush
Volatility crush is the sharp and rapid decline in implied volatility that occurs immediately after a major anticipated event — such as an earnings announcement or FDA decision — causing a significant drop in options premium even when the underlying stock moves as expected.
Implied volatility in options markets reflects the market's expectation of future price movement. Before a known catalyst — most commonly a quarterly earnings report — options on a stock will inflate in implied volatility as traders bid up contracts to position for the anticipated move. This elevated IV is often referred to as an earnings premium. Once the event passes and the uncertainty resolves, IV collapses rapidly, destroying a large portion of the extrinsic value in options regardless of which direction the stock moves. This collapse is the volatility crush.
The magnitude of a volatility crush is closely related to the size of the IV inflation that preceded it. Stocks with a history of large earnings reactions — such as Netflix (NFLX), Meta Platforms (META), or NVIDIA (NVDA) — typically see very large IV buildups before earnings and correspondingly severe post-earnings volatility collapses. In some cases, a stock can move 8-10% in the expected direction, yet an options buyer who purchased a straddle before earnings still loses money because the IV crush more than offsets the intrinsic gain from the directional move.
Understanding volatility crush is critical for anyone trading options around events. Traders who buy single options — calls or puts — before earnings often discover that even a correct directional call does not translate into profit if the stock does not move more than the implied move (the range priced into the options by the market). The implied move is typically estimated as the price of the at-the-money straddle divided by the stock price, and the actual post-earnings move must exceed this level for long option holders to profit.
Some traders specifically structure trades to profit from the volatility crush — by selling options before the event (through straddles, strangles, or iron condors) and capturing the inflated premium. These are short-vega strategies that benefit when IV falls after the event, but they carry the risk that the actual move exceeds the expected range and results in a loss that outweighs the premium collected.
The CBOE tracks single-stock and index volatility through various products. The VIX is a forward-looking measure of 30-day implied volatility on the S&P 500 and exhibits a version of volatility crush after Federal Open Market Committee (FOMC) meetings and major economic data releases. Recognizing the pre-event IV expansion and post-event IV collapse cycle is one of the most important practical skills in options trading.