These figures are computed from 15 years of actual monthly closing prices. Past seasonal patterns are not a guarantee of future performance. See our methodology for how this is calculated, or visit the Academy to learn how to read seasonal data responsibly.
Amgen seasonality — common questions
What is Amgen's best month historically?
Historically, July has been Amgen's strongest month, averaging +5.63% with a 88% win rate over 15 years of data. September has been the weakest at -1.27%.
Is Amgen seasonal?
Amgen shows a measurable seasonal pattern: its best and worst months differ by 6.90 percentage points on average. These figures come from 15 years of real monthly closing prices. Seasonality is a historical tendency, not a prediction.
How does Amgen historically perform in October?
Amgen is currently in October, which has historically averaged +1.47% with a 50% win rate. That is a historically neutral window.
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