IV Crush Explained

IV crush is one of the most reliably observed phenomena in options markets and one of the most costly mistakes for options buyers. Understanding exactly what it is, why it happens, and how to position around it separates traders who consistently lose money on earnings options from those who profit from them.

What IV crush is

IV crush is the rapid, sharp collapse in implied volatility that occurs immediately after a major scheduled event, most commonly an earnings announcement, has passed.

Within minutes of an earnings release, IV for near-term options can drop 40, 50, or even 60 percentage points. An option worth $4.00 before the announcement can be worth $1.50 afterward, even if the stock moved in exactly the right direction.

That last point is the key: IV crush can cause options buyers to lose money on perfectly correct directional calls. This is not a quirk or an anomaly. It's a structural, predictable feature of how options markets work around binary events.

Why IV crush happens

To understand IV crush, you first need to understand why IV rises before earnings.

In the days and weeks before an earnings announcement, the outcome is genuinely unknown. Will the company beat estimates? Miss? Guide up or down? How will the market react? This uncertainty causes options traders, both hedgers and speculators, to bid up option prices to reflect the unknown outcome.

The elevated IV in the lead-up to earnings is essentially an uncertainty premium. The market is charging extra for options because of the upcoming binary event.

The moment earnings are announced, whether the number is a beat, a miss, or in line, the uncertainty is resolved. The outcome is now known. The specific risk that was being priced into options is gone.

With the uncertainty gone, the demand for elevated premium evaporates. Options prices fall immediately. IV collapses. This is IV crush.

It's not driven by the direction of the stock move. It's driven by the resolution of uncertainty. A company can beat estimates and see its stock rise 8%, and near-term options buyers can still lose money if the IV collapse was larger than the gain from the move.

A concrete example

AMZN is at $190 heading into earnings. The ATM call costs $6.00. IV is 85%.

Earnings are announced. AMZN beats estimates and rises to $196, a 3.2% gain.

Post-earnings IV drops from 85% to 28%.

Your $190 call is now worth approximately $6.50... wait. Let's calculate:

• Intrinsic value: $196 − $190 = $6.00
• But IV has dropped from 85% to 28%, a 57-point collapse
• Vega loss: if the option had vega of 0.08, the IV crush costs 57 × $8 = $456 per contract
• Net result: the call might now be worth only $6.50 or even less

You paid $600, the stock moved in your favor, and you made $50 if you're lucky. The IV crush consumed almost all the value of being right on direction.

Where IV crush is largest

Earnings announcements: The most consistent and dramatic IV crush. Near-term options (expiring right after earnings) regularly experience 40–70 point IV collapses immediately after the announcement.

FOMC rate decisions: Broad market IV (VIX) often drops noticeably after Fed decisions, even when the decision is surprising. The resolution of uncertainty reduces the overall demand for options protection.

Clinical trial and FDA decisions (biotech): The most extreme IV crush in markets. Biotech options can have IV of 200%+ before a binary trial result, collapsing to 30–40% afterward.

Product launches and legal outcomes: Any scheduled binary event creates an IV premium that collapses once the event resolves.

How to tell if IV crush will hurt your position

Before entering any options trade near a known event, ask: am I long or short vega?

Long vega (bought options): IV crush hurts you. The option you own loses value as IV falls, even if the stock moves in your favor. The larger the IV drop and the higher your vega, the worse the impact.

Short vega (sold options): IV crush helps you. The option you sold loses value as IV falls, which means you can buy it back more cheaply than you sold it.

The simple rule: buying options before events is fighting IV crush. Selling options before events is harvesting IV crush.

How traders profit from IV crush

The most common approach is selling premium into the elevated pre-event IV and letting it collapse:

Short strangles before earnings: Sell an OTM call and an OTM put expiring right after earnings. Collect the inflated premium. After the announcement, IV crushes and both options lose significant value, regardless of whether the stock moved up or down (as long as it stayed within your breakevens).

Iron condors before earnings: Same concept with defined risk. Sell an OTM call spread and an OTM put spread around the expected move range. IV crush deflates the value of all four options, with the two short options losing more value than the two long options.

Calendar spreads: Sell the high-IV near-term option (capturing the earnings expiry), buy the lower-IV longer-dated option at the same strike. After IV crush deflates the near-term option, the spread profits from the differential collapsing.

The risk of selling into IV crush

Selling options before earnings is not free money. The risk is that the stock makes a move larger than the implied move, exceeding your breakeven levels and resulting in a loss despite the IV crush.

Historically, stocks move less than the implied move approximately 65–70% of the time. Sellers win more often than not. But on the 30–35% of occasions where the move exceeds the implied move, the loss can significantly exceed the premium collected.

This is why earnings premium-selling trades should be:

• Defined risk (iron condors, not naked strangles)
• Sized at 1–2% of portfolio max loss
• Entered only when the implied move is meaningfully above the historical average

Checking IV crush risk before any trade

Before buying options near any scheduled event, run this quick check:

1. What is the current IV rank? (Above 60 = danger zone for buyers)
2. What is the ATM straddle price? (This is the implied move, your breakeven)
3. Has the stock historically moved more or less than this implied move?
4. What would be my loss if IV drops 40 points after the event?

If the answers tell you you're buying expensive volatility that will likely crush and you need an above-average move just to break even, reconsider the structure or wait for a better entry.

Related terms: Implied volatility, vega, IV rank, expected move, short strangle, iron condor, calendar spread, earnings plays

Try it on Stryke: Use the Implied Earnings Move tool to see current implied move vs historical moves for every upcoming earnings event, and the Options Screener to check IV rank before entering any position.

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