The S&P 500 rose 14% through September and hit a new all-time high in early October

The S&P 500 blasted into the final quarter of 2025 with a nearly spotless record, rising 14% through the end of September and hitting a fresh all-time intraday high by Friday, the third trading day of Q4. That kind of start is statistically close to flawless. Now Bank of America says that every time in history the S&P 500 surged at least 10% by September’s end, it kept rising for the rest of the year. Well except in 2012 when the U.S. got slammed by a fiscal cliff and global growth slowed. That year, the index gave back 1% in...