Underfolio

Every trading day › 1991

The stock market on March 20, 1991

March 20, 1991, a Wednesday. The S&P 500 rose 0.36% to close at 367.92. Of 5,691 US stocks that traded, 1,945 rose and 1,504 fell.

The S&P 500+0.36%closed at 367.92
How big a move#15,146of 24,799 trading days since 1928
$100 in the index since$2,094price only, to September 24, 2026
Stocks that rose1,945of 5,691; 1,504 fell
Biggest companyExxon Mobilby market value that day

Biggest rises among the 500 largest companies

Adobe Inc. (ADBE)+8.6%
Pharmacia (PNU)+8.4%
U S Healthcare Inc (USHC)+8.0%

Biggest falls among the 500 largest companies

Chemical Waste Management (CHW)-14.4%
Waste Management Inc-Old (WMX)-7.3%
Aflac (AFL)-5.6%

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

‹ March 19, 1991 · Every March 20 · March 21, 1991 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.