Earnings Gap-Fill · Event Study

GOOGL: reclaiming the earnings gap

Trigger: a session drop of ≤ -5% (earnings-scale)  ·  then a close back above the pre-drop close within 10 sessions  ·  forward returns measured from the gap-fill day  ·  2005-01-03→2026-07-31
When GOOGL reclaims an earnings-scale gap-down within 10 sessions, forward returns skew positive — median +13.7% at 21 sessions, 60% positive (the still-below-65d cohort, the current analog).
Now: GOOGL 356.13 · -2.7% vs the 65-day MA · -11.5% from ATH · below the 65-day line
You are here. GOOGL dropped -7.1% on 2026-07-23, then closed back above the pre-gap close 6 sessions later (2026-07-31) — still below the 65-day MA, -11.5% from ATH. That is the navy cohort below.
Below-65 · 21d median
+13.7%
60% positive · n=5
vs baseline
+11.8 pts
base +2.0% at 21d
All fills · 63d median
+10.2%
n=10
Completed events
10
5 below-65 · 1 live

Forward returns from the gap-fill day

Median forward return (% positive) at 2 / 5 / 8 / 11 / 15 / 21 / 42 / 63 sessions after the reclaim. The navy cohort — filled while still below the 65-day MA — is the current GOOGL analog. Dashed gold = the unconditional baseline.
-5%+4%+13%+22%+31%2d5d8d11d15d21d42d63d
all fillsstill below 65d MAbaseline
HorizonAll fillsn=10Still below 65d MAn=5Baselineany day
2 sessions+1.2% 60%+2.0% 60%+0.2%
5 sessions+3.4% 70%+4.8% 60%+0.6%
8 sessions+5.0% 70%+8.1% 60%+0.8%
11 sessions+5.1% 70%+6.4% 60%+1.0%
15 sessions+2.9% 70%+4.2% 60%+1.5%
21 sessions+4.5% 60%+13.7% 60%+2.0%
42 sessions+9.6% 60%+15.0% 60%+3.9%
63 sessions+10.2% 60%+25.9% 60%+6.1%

Volatility & the options lens

The directional median is only half the picture — for an options trade what matters is move size vs what the market charges. Below: how this setup behaves in vol/move terms, and what GOOGL options are pricing now.
Metric (21 sessions)All fillsn=10Below-65 MAn=5Baseline
Realized vol (annualized)38.2%46.5%24.2%
Median |21-day move|14.0%15.5%
Moved > 12%60.0%100.0%
Direction up60.0%60.0%
What the options market is pricing · snapshot 2026-07-31
ATM IV (28d, exp 2026-08-28)34.6%
Implied ±1σ move±9.6%
ATM straddle7.1%breakevens ±7.1%
Setup realized vol46.5%median move 15.5%
Implied vs setup-realized: the market is charging 34.6% vol; this setup historically realized 46.5% — options screen 12 vol pts CHEAP. The straddle breaks even at ±7.1%; the setup's median 21-day move was 15.5% (100% of below-65 analogs moved >12%).
What the shape argues for. This is a volatility-expansion setup, not a quiet drift: realized vol runs ~2× baseline and essentially every analog made a large move — but the direction is regime-set (up in uptrends, hard down in bears). That points to owning the move rather than shorting it: a straddle / strangle to harvest the fat tails either way, or a call-tilted risk-reversal / call spread to lean into the 60% up-bias while defining risk. All are long premium — capped, known-at-entry loss, which fits the TEF exit-before-entry rule. Educational structure notes, not a recommendation; size to the risk budget and confirm against a live chain.

Every gap-fill · outcome over time

Each dot is one reclaim at its fill date; height is the forward 21-session return. Navy-ringed = still below the 65-day MA at the fill (the current setup).
-23%-12%-1%+10%+21%median +4.5%2008201120142017202020232026each dot = one gap-fill · y = forward 21-session return · navy ring = still below the 65d MA at the fill

The event log

Drop dateDropDays to fillCohort% from ATHFwd 21dFwd 63d
2006-01-20-8.5%+2above 65d-6.1%-14.7%-3.6%
2008-09-08-5.5%+9below 65d-39.5%-15.5%-30.9%
2008-10-07-6.8%+4below 65d-48.6%-18.3%-17.5%
2009-01-20-5.6%+1below 65d-59.1%+14.3%+26.7%
2009-03-09-5.7%+2below 65d-57.1%+17.2%+36.1%
2020-04-01-5.2%+3below 65d-22.4%+13.7%+25.9%
2020-06-26-5.5%+3above 65d-5.4%+3.2%+1.6%
2020-10-28-5.5%+2above 65d-5.9%+11.1%+18.7%
2022-07-22-5.6%+5above 65d-22.4%-5.9%-20.7%
2025-05-07-7.3%+5above 65d-19.8%+5.8%+22.9%
2026-07-23 ◀ now-7.1%+6below 65d-11.5%
Read it honestly. Small sample: 10 completed gap-fills in 2005–2026, only 5 of them below the 65-day MA. The below-65 cohort's strength is dominated by 2008–09 and 2020 crisis reclaims off far deeper drawdowns than a single earnings pullback — read it as "constructive," not a base rate. The real swing factor is the broad regime: the same reclaim faded in the 2022 bear but worked in 2020/2025 uptrends. De-clustered by 20 sessions; overlapping forward windows remain. A context gauge, not a signal — cross-check against the TEF mandate before any action.
Computed live from adjusted-close history (yfinance). "Earnings-scale drop" = any single-session decline ≤ -5% (for a mega-cap these are overwhelmingly earnings reactions). Forward return = close-to-close from the gap-fill day. Educational research, not investment advice.