Underfolio

Every trading day › 1991

The stock market on January 21, 1991

January 21, 1991, a Monday. The S&P 500 fell 0.35% to close at 331.06. Of 5,724 US stocks that traded, 1,636 rose and 1,699 fell.

The S&P 500-0.35%closed at 331.06
How big a move#15,363of 24,799 trading days since 1928
$100 in the index since$2,327price only, to September 24, 2026
Stocks that rose1,636of 5,724; 1,699 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for2stocks

Biggest rises among the 500 largest companies

General Dynamics (GD)+15.8%
McDonnell Douglas (MD)+13.7%
E-systems Inc. (ESY)+10.0%

Biggest falls among the 500 largest companies

Santa Fe Pacific Corp. (SFX)-7.5%
Becton Dickinson (BDX)-5.5%
Cons Papers (CDP)-5.4%

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

‹ January 18, 1991 · Every January 21 · January 22, 1991 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.