Oct 1, 2025 · Discover how the September Effect impacts stock market returns, with insights into historical trends, market anomalies, and theories behind this monthly pattern.

Sep 2, 2025 · More on that below. In my column today, I look at the so-called "September effect" in U.S. and other stock markets. History shows September is by far the worst month of the year for equities ...

Sep 2, 2025 · Data going back decades shows that, on average, September is the worst month for U.S. stocks – and by a considerable margin. So should investors brace for another bumpy ride this year? …

Sep 3, 2025 · Key Points September is historically the worst month for U.S. stocks, with the S&P 500 averaging a -0.8% return since 1926, known as the September Effect. Theories attribute this to …

September has historically been the worst month for US stocks. Learn why this happens and how long-term investors should respond to the September Effect.

Sep 2, 2025 · Stocks are lower to kick off the month of September, which has historically been a weak month for equities. The ‘September Effect’ refers to the tendency for stock markets to post weaker …

Sep 4, 2024 · September is the worst month for stocks. Markets underperform for a variety reasons. Here we look at Seasonality and the potential for arbitrage in September.

Sep 3, 2025 · The "September Effect," a historical tendency for stock market weakness in the ninth month, appears to be amplified by a confluence of contemporary challenges, including rising bond …

Sep 9, 2025 · The September Effect refers to the tendency of stock markets—particularly the S&P 500 and the Dow Jones Industrial Average—to underperform during the month of September.

Sep 30, 2025 · The stock market has historically lagged in September. Here's what you need to know about the September Effect as an investor.