The stock market on September 12, 1985
September 12, 1985, a Thursday. The S&P 500 fell 0.72% to close at 183.69. Of 5,710 US stocks that traded, 1,053 rose and 2,465 fell.
The S&P 500-0.72%closed at 183.69
How big a move#8,957of 24,799 trading days since 1928
$100 in the index since$4,194price only, to September 24, 2026
Stocks that rose1,053of 5,710; 2,465 fell
Biggest companyInternational Business Machines Corporationby market value that day
Biggest rises among the 500 largest companies
| Noram Energy Corp | +8.6% |
| Apple (AAPL) | +4.0% |
| Shared Medical Systems (SMS) | +3.6% |
Biggest falls among the 500 largest companies
| Entergy (ETR) | -6.7% |
| Energy East (NEG) | -5.9% |
| Sherwin-Williams (SHW) | -5.6% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 11, 1985 · Every September 12 · September 13, 1985 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.