The stock market on May 9, 1985
May 9, 1985, a Thursday. The S&P 500 rose 0.72% to close at 181.92. Of 5,719 US stocks that traded, 2,166 rose and 1,232 fell.
The S&P 500+0.72%closed at 181.92
How big a move#9,018of 24,799 trading days since 1928
$100 in the index since$4,235price only, to September 24, 2026
Stocks that rose2,166of 5,719; 1,232 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for2stocks
Biggest rises among the 500 largest companies
| DSC Communications (DIGI) | +9.9% |
| Brunswick (BC) | +7.0% |
| Ncr Corp. (NCR) | +6.3% |
Biggest falls among the 500 largest companies
| Amerada Hess (AHC) | -2.8% |
| Mitchell Energy & Devel. (MND) | -2.4% |
| Combustion Engineering (CSP) | -2.4% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ May 8, 1985 · Every May 9 · May 10, 1985 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.