The stock market on May 20, 1985
May 20, 1985, a Monday. The S&P 500 rose 1.23% to close at 189.72. Of 5,712 US stocks that traded, 2,377 rose and 1,173 fell.
The S&P 500+1.23%closed at 189.72
How big a move#4,400of 24,799 trading days since 1928
$100 in the index since$4,061price only, to September 24, 2026
Stocks that rose2,377of 5,712; 1,173 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock
Biggest rises among the 500 largest companies
| Unocal Corporation (UCL) | +9.9% |
| Louisiana-Pacific (LPX) | +7.2% |
| Electronic Data Systems (EDS.) | +6.9% |
Biggest falls among the 500 largest companies
| Noram Energy Corp | -4.5% |
| Payless Cashways (PCSH) | -3.3% |
| Southern New Eng Telecomm (SNG) | -3.0% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ May 17, 1985 · Every May 20 · May 21, 1985 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.