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.
Hang Seng Index seasonality — common questions
What is Hang Seng Index's best month historically?
Historically, January has been Hang Seng Index's strongest month, averaging +2.34% with a 75% win rate over 15 years of data. August has been the weakest at -1.87%.
Is Hang Seng Index seasonal?
Hang Seng Index shows a measurable seasonal pattern: its best and worst months differ by 4.21 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 Hang Seng Index historically perform in August?
Hang Seng Index is currently in August, which has historically averaged -1.87% with a 31% win rate. That has historically been a seasonally weak window.
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