IV crush happened. And until you understand it, you'll keep losing money on trades that "should have" worked.
What Is Implied Volatility in Simple Terms?
Implied volatility (IV) is the market's estimate of how much a stock will move in the future. Not which direction — just how much. Think of it as a fear-and-uncertainty gauge baked into option prices.
When IV is high, options are expensive. When IV is low, options are cheap. It's supply and demand — when everyone wants to buy options for protection (before earnings, before Fed meetings, before elections), the price of those options goes up. That price increase shows up as higher IV.
Here's the key insight: IV is a reflection of option prices, not the other way around. When people pay more for options, IV rises. When demand drops, IV falls. It's a fancy way of measuring how much people are willing to pay for the possibility of a big move.
A stock with 20% IV is expected to move roughly 20% over the next year (about 1.3% per week). A stock with 60% IV is expected to move three times as much. Neither number guarantees anything — it's just the market's best guess.
Why Does IV Inflate Before Earnings?
Imagine you're buying car insurance. On a normal Tuesday, your premium is $100/month. Now imagine there's a hurricane heading directly at your city. Suddenly that same insurance costs $400/month. The risk of something big happening is higher, so the insurance is more expensive.
Earnings announcements are the hurricane. Nobody knows whether the company will beat expectations by a mile or miss badly. That uncertainty makes options more valuable to buyers (they want protection or to speculate on the move), which drives prices up, which drives IV up.
Typical IV behavior around earnings:
On a stock like NVDA, normal IV might sit around 40%. In the week before earnings, it might inflate to 65-75%. The morning after the announcement, it crashes back to 38-42% — regardless of what the stock actually did.
What Is IV Crush?
IV crush is the rapid decline in implied volatility after a major event (usually earnings) removes the uncertainty that was inflating option prices. Once the earnings number is out, the "hurricane" has either hit or missed. Either way, the uncertainty is gone, and the insurance premium drops.
The IV drop is fast and brutal. A 30-60% decline in IV overnight is common. On high-IV names like NVDA, TSLA, or COIN, IV can drop 40%+ in a single session.
What this means for option prices: even if the stock moves in your favor, the IV collapse can destroy more value than the stock movement adds. That's exactly what happened to those NVDA calls.
The NVDA Earnings Example That Explains Everything
Let's use real numbers to show why IV crush is so devastating.
Before earnings:
After earnings — stock goes UP 3% to $824:
The stock went up $24 and you LOST $16.40 per share. That's $1,640 per contract — gone — even though you were right about the direction.
This is why buying options before earnings is usually a losing game. You need the stock to move MORE than the expected move (priced into the options) just to break even. NVDA's expected move might have been $40 (5%). A $24 move sounds great, but it wasn't enough to overcome the IV collapse.
Who Wins and Who Loses From IV Crush?
Winners: Option sellers. If you sold options before earnings, IV crush is your best friend. You sold at inflated prices, and the crush makes those options cheaper to buy back or lets them expire worthless. This is why "selling premium into earnings" is a popular strategy.
Losers: Option buyers. If you bought calls or puts before earnings, you paid inflated prices. Even if the stock moves your way, the IV collapse can wipe out your gains. You need a massive move to overcome the premium you overpaid.
This is the fundamental asymmetry of earnings trades. Sellers have IV crush working in their favor. Buyers have it working against them. You can still make money buying options into earnings, but the move needs to be significantly larger than what the market expected.
How Much Does IV Actually Drop After Earnings?
It varies by stock and how elevated IV was beforehand, but here are typical ranges:
| Stock Type | Pre-Earnings IV | Post-Earnings IV | IV Drop |
The higher the pre-earnings IV, the bigger the absolute drop. But percentage-wise, mid-vol stocks often experience the sharpest relative crush because expectations are more concentrated.
Strategies That Exploit IV Crush
These strategies are designed to profit from the volatility collapse:
Short Strangles and Straddles
Sell both a call and a put. You're collecting premium from both sides and betting that IV crush will deflate the prices faster than any stock move hurts you. Warning: undefined risk. A massive gap can blow you up. Not for beginners.Iron Condors
A defined-risk version of the strangle. Sell an OTM call spread and an OTM put spread. You collect premium from both sides with capped risk. If the stock stays within your expected range and IV crushes, both spreads lose value quickly. A $10-wide SPY iron condor might collect $3.00 before earnings and be worth $0.50 the next morning if the stock stays in range.Covered Calls Before Earnings
You own shares and sell calls into elevated IV. Even if the stock barely moves, the IV crush destroys the call's value, and you keep most of the premium. Just be aware: if the stock gaps up past your strike, you get called away. If it gaps down, your shares lose value even though the call profits.Calendar Spreads
Sell a short-term option (high IV, expires soon after earnings) and buy a longer-term option (also elevated, but less so). The short option gets crushed by IV more than the long option. If the stock stays near the strike, the spread widens in your favor.Strategies That Get Hurt by IV Crush
These strategies are fighting against IV crush:
Long Calls or Puts Into Earnings
You need the stock to move beyond the expected move to profit. If AAPL's expected move is $8 (roughly ±3.5%), a $7 move means you probably lose money even though you "got the direction right."Long Straddles and Strangles
Buying both calls and puts hoping for a big move in either direction. IV crush means both sides lose value simultaneously. You need a truly outsized move — well beyond the priced-in expected move — to win. The math is against you most of the time.Debit Spreads
Less hurt than naked long options because your short leg also benefits from IV crush. But on net, you still paid inflated prices, so a moderate move might not be enough.How to Check IV Before Making a Trade
Before any earnings trade, check these numbers:
IV Rank: where current IV falls relative to the past year. An IV rank of 80% means current IV is higher than it was 80% of the time over the past year. Above 50% is elevated; above 70% is a strong sell signal for premium sellers.
IV Percentile: what percentage of days had lower IV than today. More reliable than IV rank for identifying extremes.
Expected Move: most brokers display this. It tells you how much the market expects the stock to move by expiration. If the expected move is $10 and you're buying calls, you need the stock to go up more than $10 just to break even.
OptionsPilot's probability analysis shows you IV rank, expected moves, and the probability of profit for any position — so you can see whether the odds favor buyers or sellers before you put money at risk.
IV Crush Outside of Earnings
Earnings aren't the only IV crush trigger. Volatility collapses after any event that resolves uncertainty:
The principle is always the same: uncertainty inflates IV, resolution crushes it.
Practical Rules for Trading Around IV Crush
Use OptionsPilot's premium calculator to model how IV changes affect your position value. It shows you what your trade is worth at different IV levels — not just different stock prices.