The stock market on September 12, 1980
September 12, 1980, a Friday. The S&P 500 fell 0.10% to close at 125.54. Of 4,578 US stocks that traded, 1,744 rose and 1,188 fell.
The S&P 500-0.10%closed at 125.54
How big a move#21,968of 24,799 trading days since 1928
$100 in the index since$6,137price only, to September 24, 2026
Stocks that rose1,744of 4,578; 1,188 fell
Biggest companyAT&T Corporationby market value that day
Last day of trading for1stock
Biggest rises among the 500 largest companies
| Crouse Hinds (CHI) | +11.9% |
| American Financial Group, Inc. (AFG) | +9.1% |
| Archer Daniels Midland (ADM) | +8.0% |
Biggest falls among the 500 largest companies
| National Semiconductor (NSM) | -5.8% |
| Ceridian Corp (CEN) | -4.8% |
| Pepco Holdings (POM) | -3.9% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 11, 1980 · Every September 12 · September 15, 1980 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.