Every earnings season, the same thing happens to options buyers: the company beats earnings, the stock pops 3% — and your call loses money.
That's IV crush. And it's not random.
Understanding how dealers use Gamma Exposure (GEX) around earnings can tell you which options are overpriced, which moves are already hedged, and when the premium actually makes sense to buy.
What Is IV Crush?
Before an earnings report, implied volatility (IV) spikes as the market prices in the unknown outcome. After the report — regardless of the direction — IV collapses because the uncertainty is resolved.
If you paid $4 for a call and the stock moves the "right" way but IV falls from 80 to 25, you can easily net a loss.
The standard advice is: "don't buy options before earnings." But that ignores situations where the premium is cheap relative to the expected move.
GEX gives you a sharper tool.
How GEX Works Around Earnings
GEX (Gamma Exposure) measures the net dollar gamma that market makers hold across all open options positions. A positive GEX means dealers are net long gamma — they buy dips and sell rips to stay delta-neutral, suppressing volatility. A negative GEX means dealers are short gamma — they chase price, amplifying moves.
Around earnings, GEX behaves in a characteristic pattern:
1–2 weeks before earnings: GEX often turns negative or flattens. Traders are buying puts for protection and calls for upside, but with strike uncertainty (where will the stock be?), dealers accumulate significant negative gamma exposure.
Day before earnings: GEX typically hits its most negative level as open interest peaks at multiple strikes. The stock can move more freely — dealers have to chase.
Day of earnings (after the report): IV crush collapses positions. Much of the open interest expires or is closed. GEX resets toward neutral or positive. Volatility drops sharply.
1–3 days after: GEX typically recovers to positive as new option sellers step in and position for the new trading range.
The GEX Earnings Playbook
Strategy 1: Fade the IV spike (sell premium before earnings)
When GEX is deeply negative going into earnings, the market is pricing in a large move — but that move is already being hedged.
Dealers with negative gamma are buying stock on the way up and selling on the way down to manage risk. This creates a floor and ceiling within a range, even when IV is screaming.
If GEX is negative but bounded (say, -$1B to -$2B on SPY before FOMC), mean reversion plays often pay. The premium is rich, the dealers are hedged, and the actual realized move undershoots the implied move.
Setup:
- Check GEX 1–2 days before earnings
- If deeply negative but clustered at multiple strikes (not one big print), IV is likely overpriced
- Sell a straddle or strangle positioned at the GEX-neutral zone
- Take off 50% at IV crush the morning after
Risk: This fails when GEX flips to deeply negative at a single strike cluster — that signals a large directional bet, not broad hedging. Don't fade that.
Strategy 2: Buy the post-earnings re-positioning
The IV crush happens in hours, not days. By the afternoon after earnings, the stock is trading on fundamentals again, not uncertainty.
GEX after earnings typically moves back toward positive as call sellers step in and the stock finds a new range. This creates a GEX support level — a price zone where dealer hedging activity naturally stabilizes the stock.
Setup:
- Wait for IV crush to complete (usually by 11 AM ET day of or next morning)
- Check the new GEX profile on OptionScout
- Identify the GEX zero-line — the price level where dealer gamma flips from positive to negative
- Buy calls or stock on a dip toward the GEX support zone
- Target the GEX resistance zone (highest positive gamma level) for exit
This isn't an earnings bet. It's a post-earnings momentum play based on where dealers are hedged.
Strategy 3: Use GEX to size the straddle
If you want to buy the straddle (long vol before earnings), the GEX profile tells you which direction the IV crush hurts less.
When GEX is negative and the stock has been trending toward a large open interest strike, the market is pricing in a specific directional move. The straddle may be fair priced for one direction and overpriced for the other.
Look at the GEX distribution:
- If call GEX (from calls) is much larger than put GEX, dealers are more short gamma on the upside — a rally will cause more forced buying
- If put GEX dominates, the downside is more amplified
Skew your straddle toward the direction where dealer gamma is more negative. Buy 2 calls for every 1 put when call GEX dominates, for example.
This isn't a guarantee — but it adjusts your risk/reward asymmetry toward the direction where the market will be least efficient.
Big Tech Earnings: What to Watch
The highest-impact earnings in Q1 happen in late January: NFLX, TSLA, META, MSFT, AMZN, GOOGL, and AAPL all report within 10 trading days.
For mega-cap tech, GEX behavior is amplified because:
- These stocks have massive open interest — dealer gamma positions are enormous
- They're heavily weighted in SPY and QQQ — their GEX affects the index GEX
- Options volume spikes 5-10x around earnings — the IV pump is more severe
Watch for: SPY GEX turning sharply negative in the week before big tech earnings. That's not just individual stock risk — it's index-level instability. When SPY GEX is negative and big tech is reporting, implied moves will undershoot (mean reversion plays work) unless there's a macro catalyst layered on top.
Common Mistakes
Mistake 1: Buying premium when GEX is positive going into earnings
Positive GEX means dealers are long gamma — they're suppressing volatility already. Buying a straddle into a positive-GEX environment before earnings is doubly expensive: you're paying for IV that's being actively dampened by hedging flow.
Mistake 2: Holding through IV crush with long options
The IV crush is fastest in the first hour after the report. If you're holding calls or puts overnight into the earnings print, have a plan to exit immediately after the open if the thesis doesn't play out in the first 30 minutes.
Mistake 3: Using GEX without checking the OI distribution
GEX is a sum of all gamma across all strikes. A high negative GEX number could come from concentrated put buying at one strike (dangerous signal) or distributed buying across 10 strikes (normal hedging). Always look at the OptionScout GEX profile chart, not just the headline number.
Putting It Together
Earnings season creates repeatable GEX patterns because the same institutional actors do the same hedging every quarter.
The edge isn't in guessing the earnings outcome — it's in understanding where dealer gamma forces them to hedge, and positioning around that.
Before each major earnings report:
- Check the stock's GEX profile 1-2 days before the report on OptionScout
- Identify whether GEX is concentrated (directional signal) or distributed (mean reversion setup)
- After the report, track the GEX zero-line for support/resistance in the new post-earnings range
The IV crush will happen either way. The question is whether you're positioned on the right side of it.
OptionScout provides GEX data throughout the day for SPY, QQQ, and individual stocks. Check the current GEX profile →
