The takeaway
Booz Allen Hamilton Holding shows a pronounced seasonal pattern over 10 years of data — strongest in May (+4.9%) and softest in December (−3.3%).
Right now
In July, the stock has risen 80% of years, averaging +2.9%, about +0.7 pts better than the S&P 500.
The full picture
Booz Allen Hamilton Holding's most dependable month has been May, higher in 9 of 10 years; December has been its least reliable, up just 20% of the time.
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Month by month
The stock's clearest edge over the S&P 500 lands in May (+4.2 pts); it has trailed the market most in December (−4.3 pts).
“vs S&P” is Booz Allen Hamilton Holding’s average for a month minus the S&P 500’s average for that same month — isolating Booz Allen Hamilton Holding’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, May has closed higher 80% of the time versus 90% across the last 10 years — the pattern is holding.
Figures are the typical (median) May return and how often it rose — the last 5 years versus the last 10(the heatmap’s default window). This verdict stays anchored to that 10-year window even if you zoom the chart, so it never disagrees with the badges above.
In plain English
Dependability is the through-line here. May stands out, higher in 9 of 10 Mays, but it heads a clutch of months that pull the year reliably upward.
Its average (+4.9%) and median (+5.0%) land within a hair of each other — the tell of steady, year-after-year gains rather than one outlier doing the work. Crucially, the gain is the stock's own rather than a rising tide's: May has cleared the S&P 500 by +4.2 points above the index. That consistency sets it apart from the field, where the average stock manages May only about 55% of the time.
The strength clusters rather than stands alone — March–July forms a firm stretch that carries much of the year. The weaker half of the year is plainer: December has been the soft spot — the weakest of 3 months that average a loss (−3.3%), and the edge isn't year-round — the stock has trailed the S&P 500 in December, September, and February. Its roughest month on record was a −18.0% November in 2024 — a reminder of how hard even a seasonal name can fall.
A long streak recently broke — May had risen 9 years straight before a −11.1% reading in 2025. Reassuringly, the tendency has held its shape: the recent five years still track the years behind them.
The takeaway is less about when to buy than what to expect: May aside, the stock's months offer little reliable tilt.
Short answers on the stock's best month (May), its worst (December), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2016 its best month (May, +4.9%) has run well ahead of its worst (December, −3.3%) — the heatmap above shows how steady that gap has been year to year.
May has been the strongest, averaging +4.9% and closing higher in 9 of 10 years since 2016.
It's the weakest, averaging −3.3% — historically a soft spot, though it still varies from year to year.
Explore
These names have the strongest July track records on record — a starting point for comparison.
Before you trade