The stock market on September 21, 1971
September 21, 1971, a Tuesday. The S&P 500 fell 0.34% to close at 99.34. Of 2,353 US stocks that traded, 712 rose and 1,095 fell.
The S&P 500-0.34%closed at 99.34
How big a move#15,584of 24,799 trading days since 1928
$100 in the index since$7,755price only, to September 24, 2026
Stocks that rose712of 2,353; 1,095 fell
Biggest companyInternational Business Machines Corporationby market value that day
Biggest rises among the 500 largest companies
| RCA Corp (RCA) | +5.7% |
| Winnebago Industries, Inc. (WGO) | +4.6% |
| Masco (MAS) | +4.5% |
Biggest falls among the 500 largest companies
| Marathon Oil Corporation (MRO) | -5.1% |
| Continental Telecom (CTC) | -4.1% |
| White Consolidated Inds (WSW) | -3.8% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 20, 1971 · Every September 21 · September 22, 1971 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.