The stock market on September 10, 1985
September 10, 1985, a Tuesday. The S&P 500 fell 0.72% to close at 186.90. Of 5,722 US stocks that traded, 1,171 rose and 2,300 fell.
The S&P 500-0.72%closed at 186.90
How big a move#9,055of 24,799 trading days since 1928
$100 in the index since$4,122price only, to September 24, 2026
Stocks that rose1,171of 5,722; 2,300 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for6stocks
Biggest rises among the 500 largest companies
| Sonat Inc. (SNT) | +5.9% |
| Ryder System (R) | +5.3% |
| Williams (WMB) | +5.0% |
Biggest falls among the 500 largest companies
| Martin Marietta (ML) | -7.2% |
| Advanced Micro Devices (AMD) | -6.9% |
| Txu Gas Co | -6.8% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 9, 1985 · Every September 10 · September 11, 1985 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.