The stock market on July 20, 1988
July 20, 1988, a Wednesday. The S&P 500 rose 0.57% to close at 270.00. Of 6,202 US stocks that traded, 1,974 rose and 1,616 fell.
The S&P 500+0.57%closed at 270.00
How big a move#11,238of 24,799 trading days since 1928
$100 in the index since$2,853price only, to September 24, 2026
Stocks that rose1,974of 6,202; 1,616 fell
Biggest companyInternational Business Machines Corporationby market value that day
Biggest rises among the 500 largest companies
| Polaroid (PRDCQ) | +17.6% |
| Maytag (MYG) | +11.3% |
| S&P Global (MHP) | +6.2% |
Biggest falls among the 500 largest companies
| Calmat Co (CZM) | -9.3% |
| Tandem Computers Inc (TDM.) | -5.4% |
| Chemical Waste Management (CHW) | -5.3% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ July 19, 1988 · Every July 20 · July 21, 1988 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.