Underfolio

Every trading day › 1991

The stock market on January 31, 1991

January 31, 1991, a Thursday. The S&P 500 rose 0.89% to close at 343.93. Of 5,710 US stocks that traded, 2,405 rose and 1,209 fell.

The S&P 500+0.89%closed at 343.93
How big a move#7,055of 24,799 trading days since 1928
$100 in the index since$2,240price only, to September 24, 2026
Stocks that rose2,405of 5,710; 1,209 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for3stocks

Biggest rises among the 500 largest companies

Reebok International (RBK)+18.0%
Xerox (XRX)+12.4%
Kemper Corp (KEM)+12.3%

Biggest falls among the 500 largest companies

Maytag (MYG)-6.9%
American General (AGC)-4.7%
Oracle (ORCL)-4.0%

Stock moves count dividends; the index is price only. Market values after 2024 are estimates.

‹ January 30, 1991 · Every January 31 · February 1, 1991 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.