The stock market on October 23, 1985
October 23, 1985, a Wednesday. The S&P 500 rose 0.56% to close at 189.09. Of 5,729 US stocks that traded, 1,879 rose and 1,485 fell.
The S&P 500+0.56%closed at 189.09
How big a move#11,440of 24,799 trading days since 1928
$100 in the index since$4,074price only, to September 24, 2026
Stocks that rose1,879of 5,729; 1,485 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for3stocks
Biggest rises among the 500 largest companies
| Hughes Tool Co (HT.) | +8.2% |
| BP p.l.c. (BP) | +6.6% |
| American Financial Group, Inc. (AFG) | +5.7% |
Biggest falls among the 500 largest companies
| Harris (HRS) | -3.7% |
| Bethlehem Steel | -3.1% |
| Martin Marietta (ML) | -3.1% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ October 22, 1985 · Every October 23 · October 24, 1985 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.