The stock market on September 20, 1971
September 20, 1971, a Monday. The S&P 500 fell 0.28% to close at 99.68. Of 2,353 US stocks that traded, 657 rose and 1,203 fell.
The S&P 500-0.28%closed at 99.68
How big a move#16,996of 24,799 trading days since 1928
$100 in the index since$7,729price only, to September 24, 2026
Stocks that rose657of 2,353; 1,203 fell
Biggest companyInternational Business Machines Corporationby market value that day
Biggest rises among the 500 largest companies
| RCA Corp (RCA) | +8.1% |
| Winnebago Industries, Inc. (WGO) | +7.2% |
| Mattel (MAT) | +5.2% |
Biggest falls among the 500 largest companies
| Quaker State (KSF) | -6.2% |
| OfficeMax (BCC) | -3.5% |
| Amerada Hess (AHC) | -3.4% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 17, 1971 · Every September 20 · September 21, 1971 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.