How to Build an Earnings IV Crush Setup
A premium walkthrough of how to structure an earnings IV crush trade, why the event-week expiration matters most, how calendar-style setups isolate front-end volatility, and what to do when realized movement exceeds the market’s implied range.
What the setup is trying to do
An earnings IV crush setup is designed to benefit from the collapse in implied volatility that often occurs immediately after a company reports earnings. The event-week expiration usually carries the richest volatility premium because it directly captures the binary uncertainty of the release.
A common construction is to sell the front expiration that contains the earnings event and buy the same or nearby strikes in a later expiration. That creates a structure that is short the most inflated volatility while still retaining some optionality and time value in the back month.
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The trade works when event-week implied volatility is unusually expensive and collapses faster than the further-dated options you own.
When the stock gaps much farther than the market priced, short front-week gamma and intrinsic expansion can overwhelm the benefit of volatility contraction.
This setup is most useful when you compare expected move versus historical earnings behavior and define repair rules before the event hits.
Pre-trade checklist
- Measure the expected move from the event-week at-the-money straddle.
- Compare that move with historical absolute post-earnings moves.
- Check whether the front expiration is significantly richer than later expirations.
- Decide whether the cleaner expression is a calendarized straddle, a calendarized strangle, or a defined-risk short-vol structure.
- Set a plan for both a contained move and an outsized move before you enter.
Construction logic
The calendarized version is intuitive: sell the expiration containing earnings because that is where the volatility premium is often most distorted, then buy a later-dated structure at the same or nearby strikes to retain time and soften the event risk profile.
At-the-money strikes capture the event premium most directly, but they are also more sensitive to a large realized move. Wider strangles generally provide more breathing room, though they may reduce how directly the structure monetizes the event premium.
Greeks that matter
Post-earnings management
If the stock stays in range and front-end volatility collapses as expected, many traders simply close the position into the crush. If the stock blows through the expected move, the better mindset is to reassess the live book, simplify exposure, and convert what remains into a defined-risk structure that better matches the new price level.
In practice, that can mean recentring calendars, monetizing back-month protection, or converting a surviving back-month put into a spread or diagonal so that the position is easier to hold through a rebound or continued downside follow-through.
Illustrative scenario
Suppose a stock closes near 55, the market prices an 8-point earnings move, and event-week implied volatility is far above the next expiration. A trader sells the front-month at-the-money straddle near the close and buys the same strike in a later expiration to keep time value on.
If the stock opens at 42 after earnings, the front-end volatility collapse still happens, but the oversized move makes the short front-month put the problem leg. At that point, the trade is no longer just about volatility. It becomes a position-management problem, where defining the residual downside, reducing net short delta, and improving rebound behavior become more important than defending the original thesis.
Final checklist
Educational only. Not investment advice.