The stock market on September 23, 1980
September 23, 1980, a Tuesday. The S&P 500 fell 0.74% to close at 129.43. Of 4,593 US stocks that traded, 1,041 rose and 2,177 fell.
The S&P 500-0.74%closed at 129.43
How big a move#8,717of 24,799 trading days since 1928
$100 in the index since$5,952price only, to September 24, 2026
Stocks that rose1,041of 4,593; 2,177 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock
Biggest rises among the 500 largest companies
| Tom Brown Inc (TMBR) | +9.2% |
| Unocal Corporation (UCL) | +7.6% |
| Atlantic Richfield (ARCO) (ARC) | +7.4% |
Biggest falls among the 500 largest companies
| Humana (HUM) | -8.8% |
| FedEx (FDX) | -8.2% |
| Computervision Corp -old (CVN) | -8.0% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 22, 1980 · Every September 23 · September 24, 1980 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.