Underfolio

Every trading day › 1979

The stock market on April 12, 1979

April 12, 1979, a Thursday. The S&P 500 fell 0.30% to close at 102.00. Of 4,525 US stocks that traded, 1,111 rose and 1,267 fell.

The S&P 500-0.30%closed at 102.00
How big a move#16,471of 24,799 trading days since 1928
$100 in the index since$7,553price only, to September 24, 2026
Stocks that rose1,111of 4,525; 1,267 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Cyprus Mines (CYM)+34.1%
Olin (OLN)+4.6%
Mgm Grand Hotels Inc (GRH)+4.1%

Biggest falls among the 500 largest companies

Halliburton (HAL)-5.8%
American Homes 4 Rent (AMH)-5.3%
Intl. Flavors & Frag. (IFF)-3.8%

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

‹ April 11, 1979 · Every April 12 · April 16, 1979 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.