Key points
S&P 500 half-month seasonality in midterm years, 1928-2025 ｜ Late September averages -1.1% with a 42% positive rate, rebounding from October
Image source: @GlobalMktObserv
2026-09-22
In Midterm Years, the S&P 500 Falls 1.1% on Average in Late September With a 42% Hit Rate