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.
Halma seasonality — common questions
What is Halma's best month historically?
Historically, November has been Halma's strongest month, averaging +4.89% with a 87% win rate over 15 years of data. September has been the weakest at -0.83%.
Is Halma seasonal?
Halma shows a measurable seasonal pattern: its best and worst months differ by 5.72 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 Halma historically perform in October?
Halma is currently in October, which has historically averaged +0.11% with a 50% win rate. That is a historically neutral window.
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