The stock market on September 12, 1991
September 12, 1991, a Thursday. The S&P 500 rose 0.58% to close at 387.34. Of 5,731 US stocks that traded, 2,031 rose and 1,499 fell.
The S&P 500+0.58%closed at 387.34
How big a move#10,978of 24,799 trading days since 1928
$100 in the index since$1,989price only, to September 24, 2026
Stocks that rose2,031of 5,731; 1,499 fell
Biggest companyExxon Mobilby market value that day
Last day of trading for1stock
Biggest rises among the 500 largest companies
| U S Healthcare Inc (USHC) | +15.3% |
| Centocor Inc (CNTO.) | +12.3% |
| Tandem Computers Inc (TDM.) | +11.1% |
Biggest falls among the 500 largest companies
| Pfizer (PFE) | -3.7% |
| Engelhard (EC) | -3.1% |
| Kemper Corp (KEM) | -2.9% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 11, 1991 · Every September 12 · September 13, 1991 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.