IV crush is the sharp drop in implied volatility that hits options on the first session after an earnings report. Once the result is public the event uncertainty disappears, and the inflated pre-earnings premium drains out of every option — often a large chunk of the front-month at-the-money implied volatility in a single day. That's why a long call or straddle can lose money even when the stock moves your way. How big the drop is depends mostly on how elevated IV got before the print.
What is IV crush?
IV crush is the sharp drop in implied volatility on the first session after an earnings release. Once the event risk is out of the way, the market no longer needs such high option premiums. (New to the concept? Start with what is IV crush? for a worked example.)
How much does IV drop after earnings? (typical IV crush percentage)
There's no single average IV crush percentage — it depends on how high IV was bid before the report. But the typical pattern is consistent:
- Front-month, at-the-money IV usually falls the most — frequently by roughly a third to two-thirds of its pre-earnings level overnight, and sometimes more on very hyped names.
- Later-dated expirations crush far less, because they price in less of the single-event premium and more of the stock's ongoing volatility.
- The more IV ran up during the IV rush, the more there is to give back — a stock whose IV barely moved into the print has little left to crush.
How long does IV crush last?
Most of the crush happens in a single session — overnight into the first trading day after the report. Implied volatility resets from its elevated pre-earnings level back toward the stock's normal, non-event level and then stays there until the next scheduled catalyst (the next earnings date or a major event) starts pricing in. In other words, the post-event drop is fast and largely one-and-done, not a gradual decline over the following week.
How IV crush shows up in P/L
For long options (calls, puts, straddles, strangles):
- Even if the stock moves in your favor, the loss of IV can offset a big chunk of gains.
- If the move is smaller than the implied move, long premium can lose heavily.
- The closer you are to expiry, the more concentrated the crush tends to be.
For short options (short vol):
- IV crush is your friend if the stock doesn’t massively outrun the implied move.
- You profit from both time decay and volatility reset.
- But if the stock gaps outside your breakevens, losses can be large, especially for naked shorts.
Which structures are most exposed?
High exposure to IV crush
- Naked long straddles and strangles in the closest expiry.
- Deep OTM long calls/puts bought purely as lotto tickets.
Moderate exposure
- Debit spreads (call spreads, put spreads) in the event expiry.
- Inverse butterflies / inverse condors: still long vol but with some short premium to soften crush.
Short-vol structures
- Iron condors and butterflies can benefit from crush if the move is inside the structure.
- Naked short straddles/strangles benefit from crush but carry large tail risk on outlier moves.
How EarningsWatcher models IV crush
Simulator
EarningsWatcher’s Simulator applies realistic IV crush by strike and expiration instead of using a flat guess. For any structure you build, you can see:
- P/L across a range of earnings moves with crush applied.
- Worst-case and typical outcomes at 0% move, implied move, and beyond.
- How adding short wings (turning a straddle into an inverse butterfly) changes max loss and payoff profile.
What influences how hard the crush hits
- How far IV ran up during the IV rush — more run-up means more premium to give back.
- How close the expiration is — front-month, at-the-money options carry the most event premium and crush the most; later expirations crush far less.
- Whether the stock's actual move beat the implied move — a larger-than-implied move can outrun the crush, while a small move leaves the crush in control.
Common misconceptions about IV crush
- "A big IV crush always means a loss." Not necessarily — if the stock's move beats the implied move, the move can outweigh the crush.
- "IV crush is a bonus for sellers." It's already priced into the implied move; it is compensation for event risk, not free money.
- "The headline IV percentage is what matters." What decides P/L is actual move vs implied move, not the size of the IV drop on its own.
Frequently asked questions
What is IV crush after earnings?
IV crush is the sharp drop in implied volatility on the first session after an earnings release. Once the uncertainty around the event resolves, the option premiums that were inflated before the report deflate quickly.
How much does IV crush after earnings?
There's no fixed number, because it depends on how elevated implied volatility got before the report. For liquid single stocks, the front-month at-the-money IV often falls by roughly a third to two-thirds of its pre-earnings level in the first session, and sometimes more for very hyped names. Later-dated expirations crush far less. The figure that actually matters for a trade is whether the stock's move beats the implied move, not the headline IV percentage.
How long does IV crush last?
The bulk of the crush happens in a single session, usually overnight into the first trading day after the report. Implied volatility then settles near the stock's normal, non-event level and stays there until the next scheduled catalyst starts pricing in.
How do you avoid IV crush?
There are two common approaches traders take: not holding long options through the report (exiting before earnings, an IV rush trade), or positioning for the crush with short-premium structures. Long straddles and strangles held through the print are hit hardest by it.
Does IV crush affect both calls and puts?
Yes. IV crush compresses the volatility component of every option on the underlying, so both calls and puts lose extrinsic value regardless of which way the stock moves.