Underfolio

Every trading day › 1991

The stock market on May 21, 1991

May 21, 1991, a Tuesday. The S&P 500 rose 0.82% to close at 375.35. Of 5,686 US stocks that traded, 2,030 rose and 1,489 fell.

The S&P 500+0.82%closed at 375.35
How big a move#7,743of 24,799 trading days since 1928
$100 in the index since$2,053price only, to September 24, 2026
Stocks that rose2,030of 5,686; 1,489 fell
Biggest companyExxon Mobilby market value that day

Biggest rises among the 500 largest companies

Intergraph Corp (INGR.)+7.2%
Transitional Hospitals Cp (THY)+6.3%
Blockbuster (BBI)+5.6%

Biggest falls among the 500 largest companies

Martin Marietta (ML)-3.2%
Intel (INTC)-3.1%
Lotus Development Corp (LOTS.)-3.0%

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

‹ May 20, 1991 · Every May 21 · May 22, 1991 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.