The stock market on May 31, 1985
May 31, 1985, a Friday. The S&P 500 rose 0.96% to close at 189.55. Of 5,710 US stocks that traded, 1,979 rose and 1,401 fell.
The S&P 500+0.96%closed at 189.55
How big a move#6,392of 24,799 trading days since 1928
$100 in the index since$4,064price only, to September 24, 2026
Stocks that rose1,979of 5,710; 1,401 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for7stocks
Biggest rises among the 500 largest companies
| KeySpan (KSE) | +27.3% |
| Ual Corp. (UAL) | +8.6% |
| CNA Financial Corporation (CNA) | +7.5% |
Biggest falls among the 500 largest companies
| Black & Decker (BDK) | -9.4% |
| Data General Corp (DGN.) | -7.2% |
| Northwest Industries (NWT) | -7.0% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ May 30, 1985 · Every May 31 · June 3, 1985 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.