What is an earnings gap?
In one line: An earnings gap is the sudden jump or drop in a stock's price between one day's close and the next day's open after it reports results, a move no order can be adjusted during.
How it works
Companies report results after the close or before the open. The stock doesn't trade while the news lands. So the next morning it opens somewhere else, sometimes 10% or 20% away, with nothing in between.
That empty space on the chart is the gap. For an option seller, it's the one move you can't manage. There's no chance to close, roll or sell shares at $47 on the way to $40. The stock just arrives at $40.
Implied volatility prices this in. The premium before earnings is fat because the gap is expected. That's exactly why sellers in the wheel strategy check the earnings date before every trade and keep the expiry on the near side of it.
An example (hypothetical)
XYZ trades at $50 (an illustration, not a trade idea). Earnings are in two weeks. The 30-day $45 put pays $1.80 ($180), twice its usual premium. You take it.
XYZ reports, misses, and opens at $39. Then it keeps sliding.
| XYZ at expiry | What happens | Result |
|---|---|---|
| $51 (if it had gapped up) | Put expires | +$180 |
| $45 | Put expires | +$180 |
| $39 (the gap) | Assigned at $45 | −$600 + $180 = −$420 |
| $35 (two weeks later) | Assigned at $45 | −$1,000 + $180 = −$820 |
The extra $90 of premium was the market's price for the gap. The gap cost $600 on day one and $1,000 by expiry. You could have bought the put back the morning after, for about $650: a −$470 loss, locked in. Every path through that morning loses.
Why it matters for sellers
An earnings gap breaks the two things a seller relies on. The one-standard-deviation range is built for ordinary days, not for the one night a year the company tells the market everything. And rolling, the seller's usual escape, needs the stock to get there step by step. A gap skips the steps.
So the rule is plain: no earnings inside the expiry. Sell the put after the report, when the gap is known and IV has dropped, or sell an expiry that ends before it. The rich premium before the date is the market paying you for a risk you don't control. Our IV crush guide explains why the premium deflates right after.
Questions
Can I sell a put through earnings if the strike is far away?
You can, but the gap decides how far is far. A 20% gap through a strike 10% away is a loss that no roll can undo. Most wheel sellers simply don't sell across the date.
Why is the premium so high before earnings?
Because the market expects a big move and prices the options for it. That premium is the fee for taking on the gap, not free money for a calm month.
What if I'm already in a trade and earnings got moved inside my expiry?
Decide before the date, not after. Close the position, or roll it to an expiry before the report. Our guide on earnings inside your expiry walks through the choices.
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