The stock market on December 21, 1970
December 21, 1970, a Monday. The S&P 500 fell 0.31% to close at 89.94. Of 2,294 US stocks that traded, 851 rose and 990 fell.
The S&P 500-0.31%closed at 89.94
How big a move#16,303of 24,799 trading days since 1928
$100 in the index since$8,566price only, to September 24, 2026
Stocks that rose851of 2,294; 990 fell
Biggest companyInternational Business Machines Corporationby market value that day
Biggest rises among the 500 largest companies
| Memorex Corp (MRX) | +13.2% |
| Stevens (J.P.) & Co | +5.9% |
| Smithkline Beckman Corp (SKB) | +3.7% |
Biggest falls among the 500 largest companies
| Uop Inc (UOP) | -6.8% |
| Marine Midland Banks (MM) | -6.1% |
| American General (AGC) | -5.4% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ December 18, 1970 · Every December 21 · December 22, 1970 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.