The stock market on August 20, 1984
August 20, 1984, a Monday. The S&P 500 rose 0.49% to close at 164.94. Of 5,799 US stocks that traded, 1,499 rose and 1,653 fell.
The S&P 500+0.49%closed at 164.94
How big a move#12,678of 24,799 trading days since 1928
$100 in the index since$4,671price only, to September 24, 2026
Stocks that rose1,499of 5,799; 1,653 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock
Biggest rises among the 500 largest companies
| Engelhard (EC) | +5.9% |
| Norton Co (NRT) | +4.4% |
| Mellon Financial (MEL) | +4.0% |
Biggest falls among the 500 largest companies
| Molex (MOLX) | -7.2% |
| Homestake Mining (HM) | -5.2% |
| Lowe's (LOW) | -4.9% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ August 17, 1984 · Every August 20 · August 21, 1984 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.