The Complete Guide to IV Crush and How to Trade Around It

IV crush is the rapid decline in implied volatility that occurs after a significant event, most commonly an earnings announcement. In the days and weeks leading up to earnings, uncertainty about the results drives demand for options, pushing implied volatility higher. The moment the earnings report is released, that uncertainty is resolved, and IV collapses, often dropping 30% to 60% overnight. This collapse in IV causes option premiums to shrink dramatically, even if the stock makes a significant move.

The mechanics of IV crush create a trap for inexperienced traders. A common mistake is buying calls before earnings because you expect a positive report. The stock might gap up 5% on great results, but if the options were priced for a 7% move, the IV crush more than offsets the directional gain, and your calls lose value despite being right about the direction. This is why buying naked options into earnings is widely considered one of the lowest-probability strategies in options trading.

To estimate the expected move going into earnings, look at the at-the-money straddle price for the nearest expiration after the announcement. If the stock trades at $100 and the straddle costs $8, the market is pricing in an $8 or 8% move in either direction. The stock needs to move beyond that range for a straddle buyer to profit. Historical data shows that stocks stay within the expected move roughly 70% to 75% of the time, which is why selling premium into earnings has a statistical edge.

Strategies that benefit from IV crush include short strangles, iron condors, and short vertical spreads. These positions profit when IV declines because they are short vega, meaning they gain value as implied volatility falls. The key risk management principle is to define your risk on every trade. Selling a naked strangle into earnings can work ten times in a row and then produce a catastrophic loss on the eleventh. Using defined-risk structures like iron condors ensures that your maximum loss is known before you enter the trade.

Timing also matters. IV tends to ramp up most sharply in the final five trading days before an earnings announcement. If you plan to sell premium, entering the position one to two weeks before earnings allows you to capture the IV expansion and then benefit from the crush. Entering too early means your capital is tied up in a position with lower theta decay, while entering the day before means you missed most of the IV inflation that makes the trade attractive in the first place.