The stock market on May 21, 1971
May 21, 1971, a Friday. The S&P 500 fell 0.32% to close at 100.99. Of 2,319 US stocks that traded, 760 rose and 1,127 fell.
The S&P 500-0.32%closed at 100.99
How big a move#16,182of 24,799 trading days since 1928
$100 in the index since$7,629price only, to September 24, 2026
Stocks that rose760of 2,319; 1,127 fell
Biggest companyInternational Business Machines Corporationby market value that day
Biggest rises among the 500 largest companies
| Pullman (PU) | +5.4% |
| Ralston Purina (RAL) | +4.1% |
| Signal Companies (SGN) | +3.9% |
Biggest falls among the 500 largest companies
| OfficeMax (BCC) | -6.5% |
| Blair Corp (BL) | -6.4% |
| Dun & Bradstreet Holdngs Inc (DNB) | -4.9% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ May 20, 1971 · Every May 21 · May 24, 1971 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.