The stock market on September 17, 1970
September 17, 1970, a Thursday. The S&P 500 rose 0.61% to close at 82.29. Of 2,270 US stocks that traded, 1,329 rose and 554 fell.
The S&P 500+0.61%closed at 82.29
How big a move#10,571of 24,799 trading days since 1928
$100 in the index since$9,362price only, to September 24, 2026
Stocks that rose1,329of 2,270; 554 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock
Biggest rises among the 500 largest companies
| Ampex Corp (APX) | +8.7% |
| Allegheny Technologies (ATI) | +7.4% |
| Bendix Corp | +7.0% |
Biggest falls among the 500 largest companies
| RadioShack (TAN) | -6.3% |
| Natomas Co (NOM) | -5.5% |
| Target (TGT) | -5.0% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 16, 1970 · Every September 17 · September 18, 1970 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.