Earnings season is the most exciting — and most dangerous — window for options traders. Stock prices routinely gap 5%, 10%, or more overnight after a report drops. This article explains what earnings gaps are, how to read historical gap data, and how to use AI Stock Monitor's gap signals to make better options decisions.

What Is an Earnings Gap?

An earnings gap is the overnight price jump that occurs after a company reports quarterly results. For example, if a stock closes at $100 and opens at $95 the next morning after a disappointing report, that 5% drop is the earnings gap.

Here are the three key data points you need to understand:

Gap
Historical Avg Gap
The average magnitude of post-earnings price jumps (absolute value) across past quarters. A larger gap means the market reacts more violently to this stock's earnings — options need to be priced with a wider risk premium.
%
Up Probability
The percentage of past earnings where the stock gapped up. 100% means it has risen every time; 0% means it has fallen every time. This tells you the market's historical directional bias for this name.
Max
Max Gap
The single largest post-earnings gap in the stock's history. This is your tail-risk reference — if you sell options into earnings, your strike should at minimum cover this distance, or one black-swan report could blow through your position.

Live Earnings Gap Signals from AI Stock Monitor

Below are earnings gap alerts detected by AI Stock Monitor on April 14, 2026:

AI Stock Monitor screenshot showing earnings gap alerts for ABT, JPM, and TSM
AI Stock Monitor · aistockmonitor.io · Apr 14 Earnings Gap Signals
ABT
Medical Devices Leader · Earnings in 2 days
—
IVP Percentile
HV Realized±5.4%
IV Market Expected25%↑
Avg Gap ±5.4% · Up probability only 25% · Max gap -10.9% · 4 samples
TSM
TSMC ADR · Earnings in 2 days
—
IVP Percentile
HV Realized±3.7%
IV Market Expected100%↑
Avg Gap ±3.7% · Up probability 100% · Max gap +4.8% · 4 samples
JPM
JPMorgan Chase · Earnings Gap + IV High dual signal
94%
IVP Percentile
HV Realized±0.3%
IV Market Expected0%↑
Avg Gap ±0.3% · Up probability 0% · IV Rank 94% · 3 samples

How to Use Earnings Gap Data for Options Decisions

Seller's Perspective: Gap Data Sets Your Strike Distance

If you plan to sell options into earnings — say, a short put or an iron condor — the historical average gap and max gap are the core references for setting your strike price. Your strike distance from the current price should be at least as wide as the historical average gap, and ideally wide enough to survive the max gap.

Take ABT as an example: the average gap is ±5.4%, and the max gap is -10.9%. If you sell a put, your strike should be at least 5.4% below the current price — and conservative sellers would want 10%+ of downside cushion.

Earnings gap data is not a directional prediction tool. It is a risk-sizing tool. Options sellers don't fear being wrong on direction — they fear a gap that blows through their safety margin.

Buyer's Perspective: Big Gap + Directional Skew = Opportunity

If a stock historically gaps large on earnings (like TSM's ±3.7%) and the up probability is highly skewed to one side (TSM has gapped up 100% of the time), buyers can consider directional plays before the report. But be aware — IV is usually elevated pre-earnings, so the gap expectation is already priced in.

This is exactly why JPM triggered a dual signal: earnings gap + IV high. With an IV Rank of 94%, options are expensive — buyer's cost is high, which actually favors sellers.

The Four-Step Earnings Options Framework

1
Check the historical gap: Review the average and max post-earnings gap to quantify the risk boundary.
2
Read the directional skew: Is the up probability strongly bullish or bearish? 100% and 0% are extreme signals; 25%-75% means direction is uncertain.
3
Factor in IV levels: IV typically rises into earnings. If IVP is already very high (like JPM at 94%), sellers collect fatter premium. If IV is still low, the risk/reward for selling is poor.
4
Set your safety distance: Sellers should place strikes at least one average gap away from the current price — conservative traders use the max gap. Buyers should evaluate whether IV has already priced in the expected move.

How AI Stock Monitor Tracks Earnings Gaps

Manually checking every holding's earnings date, historical gap stats, and IV levels is tedious and error-prone. AI Stock Monitor scans your portfolio and watchlist automatically, pushing gap alerts as earnings approach — including the average gap, up probability, max gap, IV level, and countdown.

The ABT, TSM, and JPM signals in this article were automatically detected on April 14. When a gap signal and an IV-high signal fire together (like JPM), the system stacks the labels so you know this is a window that demands extra attention.

Earnings gap = your risk boundary
Know how far it has jumped before — then decide how far to place your strike
AI Stock Monitor helps you size every earnings trade

Try aistockmonitor.io free →