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.
Vanguard S&P 500 seasonality — common questions
What is Vanguard S&P 500's best month historically?
Historically, November has been Vanguard S&P 500's strongest month, averaging +3.32% with a 87% win rate over 15 years of data. September has been the weakest at -1.11%.
Is Vanguard S&P 500 seasonal?
Vanguard S&P 500 shows a measurable seasonal pattern: its best and worst months differ by 4.43 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 Vanguard S&P 500 historically perform in August?
Vanguard S&P 500 is currently in August, which has historically averaged +0.35% with a 63% win rate. That is a historically neutral window.
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