The stock market on September 15, 1986
September 15, 1986, a Monday. The S&P 500 rose 0.55% to close at 231.94. Of 5,952 US stocks that traded, 1,700 rose and 2,188 fell.
The S&P 500+0.55%closed at 231.94
How big a move#11,578of 24,799 trading days since 1928
$100 in the index since$3,322price only, to September 24, 2026
Stocks that rose1,700of 5,952; 2,188 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for6stocks
Biggest rises among the 500 largest companies
| Amax Inc. (AMX) | +12.0% |
| Genentech Inc (DNA) | +10.5% |
| Viacomcbs Inc (VIAC) | +7.2% |
Biggest falls among the 500 largest companies
| Hutton (E.F.) Group (EFH) | -7.3% |
| Quantum Chemical (CUE) | -5.7% |
| CMS Energy (CMS) | -5.6% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 12, 1986 · Every September 15 · September 16, 1986 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.