Underfolio

Every trading day › 1975

The stock market on May 30, 1975

May 30, 1975, a Friday. The S&P 500 rose 1.64% to close at 91.15. Of 4,597 US stocks that traded, 1,992 rose and 609 fell.

The S&P 500+1.64%closed at 91.15
How big a move#2,560of 24,799 trading days since 1928
$100 in the index since$8,452price only, to September 24, 2026
Stocks that rose1,992of 4,597; 609 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock

Biggest rises among the 500 largest companies

Mesa Inc (MXP.)+11.8%
Cigna (CI)+11.4%
Bicoastal Corp+9.2%

Biggest falls among the 500 largest companies

Technicon Corp (TCN)-3.2%
Texas Oil & Gas (TXO)-2.9%
Carnation (CMK)-2.7%

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

‹ May 29, 1975 · Every May 30 · June 2, 1975 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.