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.
KOSPI Index seasonality — common questions
What is KOSPI Index's best month historically?
Historically, April has been KOSPI Index's strongest month, averaging +3.47% with a 63% win rate over 15 years of data. August has been the weakest at -1.28%.
Is KOSPI Index seasonal?
KOSPI Index shows a measurable seasonal pattern: its best and worst months differ by 4.75 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 KOSPI Index historically perform in August?
KOSPI Index is currently in August, which has historically averaged -1.28% with a 44% win rate. That has historically been a seasonally weak window.
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