The stock market on September 15, 2025
September 15, 2025, a Monday. The S&P 500 rose 0.47% to close at 6615.28. Of 3,532 US stocks that traded, 1,633 rose and 1,792 fell.
The S&P 500+0.47%closed at 6615.28
How big a move#12,951of 24,799 trading days since 1928
$100 in the index since$116price only, to September 24, 2026
Stocks that rose1,633of 3,532; 1,792 fell
Biggest companyNvidiaby market value that day
Biggest rises among the 500 largest companies
| Oklo Inc. (OKLO) | +15.7% |
| Affirm Holdings (AFRM) | +7.6% |
| Unity Software (U) | +6.8% |
Biggest falls among the 500 largest companies
| Corteva (CTVA) | -5.7% |
| Sprouts Farmers Market (SFM) | -5.2% |
| Erie Indemnity (ERIE) | -5.0% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
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Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.