The stock market on January 31, 1985
January 31, 1985, a Thursday. The S&P 500 rose 0.13% to close at 179.63. Of 5,742 US stocks that traded, 1,718 rose and 1,668 fell.
The S&P 500+0.13%closed at 179.63
How big a move#20,861of 24,799 trading days since 1928
$100 in the index since$4,289price only, to September 24, 2026
Stocks that rose1,718of 5,742; 1,668 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for3stocks
Biggest rises among the 500 largest companies
| Alexander/Baldwn (ALEX) | +10.7% |
| Unocal Corporation (UCL) | +10.5% |
| Mesa Inc (MXP.) | +7.3% |
Biggest falls among the 500 largest companies
| Primerica, Inc. (PRI) | -6.0% |
| Cullinet Software (CUL) | -4.9% |
| MCI Communications (MCIC.) | -4.8% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ January 30, 1985 · Every January 31 · February 1, 1985 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.