IV Crush
IV crush is the sudden collapse in implied volatility after a major event (earnings, FDA approval, earnings release, merger announcement). Option premiums that were fat and expensive before the event become thin and cheap after the event—even if the stock moved exactly as predicted.
IV crush is why most retail traders lose on earnings plays. They're right about direction but wrong about time value and volatility. IV crush eats all their profits.
Why IV Spikes Before Events
Before earnings or major announcements, traders don't know what will happen. Uncertainty is high. This drives implied volatility up:
XYZ stock before earnings (Friday 4pm close):
- IV: 75% (traders expect wild move)
- Call at $100 strike, 30 days to exp: costs $4.50
- Put at $100 strike, 30 days to exp: costs $4.50
- Total straddle cost: $9
Traders are paying high premiums for the right to profit from big moves, in either direction. The uncertainty is worth money.
The Moment of Truth: What Happens at Earnings
Let's say XYZ reports earnings Monday morning:
Scenario 1: Company beats earnings
- Stock jumps from $100 to $108 (+8%, up big)
- But uncertainty resolved — now everyone knows the earnings number
- IV crashes from 75% to 30%
Scenario 2: Company misses badly
- Stock crashes from $100 to $92 (−8%, down big)
- But uncertainty resolved — now everyone knows the earnings number
- IV crashes from 75% to 30%
The key insight: IV crashes in BOTH scenarios. The direction of the move doesn't matter. What matters is the uncertainty is gone. The event happened. Now the market prices options based on new information, not "what might happen."
The IV Crush Kill: Call Buyer's Example
You bought a call before earnings, expecting a rally:
Before earnings (Friday close):
- Stock: $100
- You buy 1 call at $105 strike for $3 (paying $300)
- IV: 75%
- Delta: 0.40, Vega: 0.30
After earnings (Monday morning):
- Stock: $108 (rallies as expected!)
- You should profit, right?
At Monday open:
- Call at $105 strike is now ITM (worth at least $3 intrinsic)
- But IV crashes to 30%
- Vega loss: 45 percentage points × 0.30 = $13.50 loss per share
- Total loss on vega: $1,350
Your call is now worth:
- Intrinsic value: $3 ($108 − $105)
- Time value: ~$0.50 (from $1 before, crushed by IV and time)
- Total: $3.50
Result:
- You paid $3, now worth $3.50, profit $0.50 = 17% return
- Stock rallied 8%, but IV crush wiped out 7% of your gains
If stock had moved smaller:
After earnings (stock at $104):
- Call at $105 strike now OTM but close
- Worth maybe $0.75 (nearly all time value gone, some vega loss)
- You paid $3, sold at $0.75, loss $2.25 = 75% loss
- Stock barely moved, but IV crush killed you
This is IV crush. You were right about direction, half-right about magnitude, but wrong about the calendar (IV collapse). Result: devastating loss.
The IV Crush Kill: Put Buyer's Example
You bought a put before earnings, expecting a crash:
Before earnings:
- Stock: $100
- You buy 1 put at $95 strike for $2.50 (paying $250)
- IV: 75%
After earnings:
- Stock: $98 (drops as expected)
- Put is now ITM, worth at least $2.97 intrinsic
- But IV crashes to 30%
- IV crush loss wipes out time value gains
Result:
- You paid $2.50, now worth ~$3.20
- Profit: $0.70 = 28% return
- Stock dropped 2%, but IV crush limited gains
Again, IV crush prevented you from making the full profit that direction alone suggests.
IV Crush Is the Option Seller's Dream
If you sold that call before earnings:
You sold the call for $3 (collected $300)
After earnings:
- Stock rallies to $108
- Call at $105 now worth $3.50
- You're short, so you're down $0.50 per share = $50 loss
- You collected $300, now down $50, profit = $250
Or if stock only rallies to $104:
- Call worth $0.75
- You collected $300, short call now worth $75
- Profit: $225 (75% return on capital risk)
As an option seller, IV crush is your best friend. You collect inflated premiums before the event, the event happens (direction doesn't matter much), IV crashes, and your short options collapse in value. You keep most or all of the premium.
This is why professional traders are net premium sellers (short vega). They collect premium when IV is high, let the event happen, IV crashes, and they profit from vega collapse.
IV Crush Timing: When Does It Hit Hardest?
IV crush hits immediately after the uncertainty-causing event:
Earnings:
- Before release: IV 75%
- At 4:05pm on earnings release: IV 50% (still elevated, execution uncertainty)
- Next morning: IV 30% (fully crushed, event over, new direction priced in)
- IV keeps dropping over week as shock wears off
FDA Approval Decision:
- Before announcement: IV 80%
- 5 minutes after approval: IV 40% (instant crush)
- Next day: IV 25% (fully compressed)
Market crashes (Black Swan):
- Before crash: IV 20% (normal)
- During crash: IV 60% (SPIKE, not crush)
- Day after: IV 40% (some crush relief-rally)
- Week after: IV 30% (mostly crushed, but elevated vs pre-crash)
How to Profit from IV Crush: The Seller's Playbook
Sell before the event (high IV):
- Sell calls, puts, straddles, spreads
- Collect fat premiums
Wait for event to happen:
- Direction doesn't matter (theta and IV crush work for you)
- Most profitable if stock stays near your strike
Close the position early if profitable:
- You don't need to hold to expiration
- Lock in profit and move on
Repeat:
- There's an earnings season every quarter
- Earnings surprises every week
- IV crush is predictable; harvest it
Real example:
- Iron condor: sell both call and put wings
- Collect $3 per share total premium
- Event happens, IV crushes
- Close both sides for $1 per share cost
- Profit: $2 per share = $200 on $300 risk = 67% return in a week
How to Survive IV Crush: The Buyer's Playbook
If you insist on buying options before earnings:
Buy spreads, not naked calls/puts:
- Buy call, sell call (bull call spread)
- Lower cost entry, less vega risk
- Example: Buy $105 call, sell $110 call
- Cost: $1 instead of $3, profit capped at $4, but vega crush is half as bad
Buy far out of the money (longer duration):
- 60 days to expiration, not 7 days
- IV crush happens, but you have time for stock to move further
- Higher chance of multi-day trending move that compensates for IV crush
Buy volatility expansion plays:
- If IV will expand (not crush) post-earnings, you're safe
- Rare—IV usually crushes—but possible in surprise scenarios
Avoid earnings night:
- Buy options weeks before earnings
- Sell them days before earnings (when IV peaks)
- Lock in IV expansion profits before the actual event
Use straddles only in mega-volatile stocks:
- Only in mega-cap tech (AAPL, MSFT, TSLA) where moves >10%
- Even then, IV crush hurts, but huge price moves can overcome it
The Math: Why IV Crush Is Bigger Than You Think
Before earnings:
- Call price: $3
- Delta: 0.40 (you gain $0.40 per $1 stock move)
- Vega: 0.30 (you lose $0.30 per 1% IV drop)
Stock moves $5 (big move, +5%):
- Delta gain: 0.40 × $5 = $2.00
- Vega loss (IV drops 45%): 0.30 × 45 = $13.50 loss
Wait, that doesn't add up. You gain $2 from direction but lose $13.50 from vega? No, I made an error. Let me recalculate:
- Delta gain: 0.40 × $5 = $2.00
- Vega loss: 0.30 × 45% drop = 0.30 × 4.5 (I was using vega per 1% drop) = $1.35 loss per share = $135 total on contract
- Net: $2.00 − $1.35 = $0.65 gain per share
After IV crush, a $5 stock move nets only $0.65 per share profit instead of $2.00. IV crush ate 68% of your directional gains.
Key Takeaways
- IV crush is the collapse in implied volatility after earnings/events (uncertainty resolved = lower IV)
- IV crush destroys option buyers: they pay inflated premiums before the event, then vega losses wipe out directional gains
- IV crush enriches option sellers: they collect inflated premiums, event happens, IV drops, short options collapse in value
- IV crush hits immediately after the event (earnings release, FDA announcement) and continues for days
- Profitable traders buy options when IV is low (before IV spikes), sell them when IV is high (before IV crushes)
- Spreads reduce vega risk; naked options get massacred by IV crush
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