The takeaway
The Boeing Company shows a moderate seasonal pattern over 10 years of data — strongest in December (+4.9%) and softest in October (−2.8%).
Right now
In July, the stock has risen 70% of years, averaging +4.4%, about +2.2 pts better than the S&P 500.
The full picture
The Boeing Company's most dependable month has been December, higher in 8 of 10 years; October 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 November (+6.8 pts); it has trailed the market most in March (−6.4 pts).
“vs S&P” is The Boeing Company’s average for a month minus the S&P 500’s average for that same month — isolating The Boeing Company’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, December has closed higher 100% of the time versus 80% across the last 10 years — the pattern is strengthening.
Figures are the typical (median) December 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: December, up in 8 of 10 Decembers while the other eleven tend to blur together.
Its average (+4.9%) and median (+7.7%) 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 December ranges by 8.4% 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: December has cleared the S&P 500 by +3.9 points above the index. That consistency sets it apart from the field, where the average stock manages December only about 58% of the time.
A few other months pull their weight: May, June, and July have also closed higher more often than not. The weaker half of the year is plainer: October has been the soft spot — the weakest of 4 months that average a loss (−2.8%), and the edge isn't year-round — the stock has trailed the S&P 500 in March, October, and April. Its roughest month on record was a −48.4% March in 2020 — a reminder of how hard even a seasonal name can fall.
December has now closed higher 6 years running. If anything it has sharpened recently — the last five Decembers run ahead of the earlier years.
The takeaway is less about when to buy than what to expect: December aside, the stock's months offer little reliable tilt.
Short answers on the stock's best month (December), its worst (October), and whether it really trades seasonally.
Yes, to a moderate degree. Since 2016 its best month (December, +4.9%) has run well ahead of its worst (October, −2.8%) — the heatmap above shows how steady that gap has been year to year.
December has been the strongest, averaging +4.9% and closing higher in 8 of 10 years since 2016.
It's the weakest, averaging −2.8% — 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