The takeaway
Amgen Inc shows a moderate seasonal pattern over 10 years of data — strongest in November (+3.5%) and softest in October (−2.4%).
Right now
In July, the stock has risen 80% of years, averaging +2.6% — essentially in line with the S&P 500.
The full picture
Amgen Inc's most dependable month has been November, higher in 8 of 10 years; October 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 August (+1.9 pts); it has trailed the market most in October (−3.4 pts).
“vs S&P” is Amgen Inc’s average for a month minus the S&P 500’s average for that same month — isolating Amgen Inc’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, November has closed higher 60% of the time versus 80% across the last 10 years — the pattern is weakening.
Figures are the typical (median) November 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. November stands out, higher in 8 of 10 Novembers, but it heads a clutch of months that pull the year reliably upward.
Its average (+3.5%) and median (+3.6%) 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: November has cleared the S&P 500 by +1.2 points above the index. That consistency sets it apart from the field, where the average stock manages November only about 62% of the time.
A few other months pull their weight: January, March, and June have also closed higher more often than not. On the other side of the ledger, October has been the soft spot — the weakest of 3 months that average a loss (−2.4%), and the edge isn't year-round — the stock has trailed the S&P 500 in October, February, and April. Its roughest month on record was a −15.6% October in 2016 — a reminder of how hard even a seasonal name can fall.
The pattern has softened of late, November's last five years slipping below its longer-run record.
The takeaway is less about when to buy than what to expect: November aside, the stock's months offer little reliable tilt.
Short answers on the stock's best month (November), its worst (October), and whether it really trades seasonally.
Yes, to a moderate degree. Since 2016 its best month (November, +3.5%) has run well ahead of its worst (October, −2.4%) — the heatmap above shows how steady that gap has been year to year.
November has been the strongest, averaging +3.5% and closing higher in 8 of 10 years since 2016.
It's the weakest, averaging −2.4% — 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