The stock market on April 20, 1971
April 20, 1971, a Tuesday. The S&P 500 fell 0.38% to close at 103.61. Of 2,309 US stocks that traded, 616 rose and 1,333 fell.
The S&P 500-0.38%closed at 103.61
How big a move#14,694of 24,799 trading days since 1928
$100 in the index since$7,436price only, to September 24, 2026
Stocks that rose616of 2,309; 1,333 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock
Biggest rises among the 500 largest companies
| H&R Block (HRB) | +6.8% |
| Mercantile Stores (MST.) | +5.7% |
| Marsh & McLennan (MMC) | +5.7% |
Biggest falls among the 500 largest companies
| Electronic Data Systems (EDS.) | -8.0% |
| Sperry (SY) | -5.5% |
| TRW Inc. (TRW) | -5.2% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ April 19, 1971 · Every April 20 · April 21, 1971 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.