The takeaway
Boston Beer Company Inc shows a pronounced seasonal pattern over 10 years of data — strongest in July (+7.8%) and softest in January (−3.4%).
Right now
In July, the stock has risen 70% of years, averaging +7.8%, about +5.6 pts better than the S&P 500.
The full picture
Boston Beer Company Inc's most dependable month has been July, higher in 7 of 10 years; January has been its least reliable, up just 30% of the time.
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Month by month
The stock's clearest edge over the S&P 500 lands in July (+5.6 pts); it has trailed the market most in January (−3.2 pts).
“vs S&P” is Boston Beer Company Inc’s average for a month minus the S&P 500’s average for that same month — isolating Boston Beer Company Inc’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, July has closed higher 60% of the time versus 70% across the last 10 years — the pattern is weakening.
Figures are the typical (median) July 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
Strip the year back and a single month does the heavy lifting: July, up in 7 of 10 Julys while the other eleven tend to blur together.
Its average (+7.8%) and median (+6.7%) land within a hair of each other — the tell of steady, year-after-year gains rather than one outlier doing the work. That reliability comes with real swings, mind — even July ranges by 18.9% from year to year, so any single year can land far from the average. Crucially, the gain is the stock's own rather than a rising tide's: July has cleared the S&P 500 by +5.6 points above the index. Some of that is a strong month market-wide, mind — July rises for about 61% of stocks — so the tendency is real if not unique.
A few other months pull their weight: October and November have also closed higher more often than not. On the other side of the ledger, January has been the soft spot — the weakest of 5 months that average a loss (−3.4%), and the edge isn't year-round — the stock has trailed the S&P 500 in January, September, and November.
The pattern has softened of late, July's last five years slipping below its longer-run record.
The takeaway is less about when to buy than what to expect: July aside, the stock's months offer little reliable tilt.
Short answers on the stock's best month (July), its worst (January), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2016 its best month (July, +7.8%) has run well ahead of its worst (January, −3.4%) — the heatmap above shows how steady that gap has been year to year.
July has been the strongest, averaging +7.8% and closing higher in 7 of 10 years since 2016.
It's the weakest, averaging −3.4% — 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