The stock market on September 11, 1980
September 11, 1980, a Thursday. The S&P 500 rose 0.68% to close at 125.66. Of 4,576 US stocks that traded, 1,938 rose and 929 fell.
The S&P 500+0.68%closed at 125.66
How big a move#9,537of 24,799 trading days since 1928
$100 in the index since$6,131price only, to September 24, 2026
Stocks that rose1,938of 4,576; 929 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock
Biggest rises among the 500 largest companies
| Pogo Producing Co (PPP) | +7.4% |
| Cities Service Co | +7.2% |
| American Financial Group, Inc. (AFG) | +5.6% |
Biggest falls among the 500 largest companies
| Tektronix (TEK) | -7.5% |
| Mgic Investment Corp (MGI) | -3.9% |
| Coca-Cola (KO) | -3.7% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 10, 1980 · Every September 11 · September 12, 1980 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.