Underfolio

Every trading day › 1975

The stock market on April 21, 1975

April 21, 1975, a Monday. The S&P 500 rose 1.08% to close at 87.23. Of 4,609 US stocks that traded, 1,684 rose and 882 fell.

The S&P 500+1.08%closed at 87.23
How big a move#5,418of 24,799 trading days since 1928
$100 in the index since$8,832price only, to September 24, 2026
Stocks that rose1,684of 4,609; 882 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Clorox (CLX)+13.8%
Mesa Inc (MXP.)+10.4%
Allegheny Technologies (ATI)+10.1%

Biggest falls among the 500 largest companies

Freeport-McMoran (FTX)-10.7%
W.W. Grainger (GWW)-4.9%
Dome Mines (DM)-3.7%

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

‹ April 18, 1975 · Every April 21 · April 22, 1975 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.