Underfolio

Every trading day › 1984

The stock market on January 12, 1984

January 12, 1984, a Thursday. The S&P 500 fell 0.03% to close at 167.75. Of 5,623 US stocks that traded, 1,767 rose and 1,506 fell.

The S&P 500-0.03%closed at 167.75
How big a move#23,871of 24,799 trading days since 1928
$100 in the index since$4,593price only, to September 24, 2026
Stocks that rose1,767of 5,623; 1,506 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Mgm/Ua Home Entertainment Gp (HEG)+6.6%
Kaisertech Ltd+4.8%
E-systems Inc. (ESY)+3.8%

Biggest falls among the 500 largest companies

Searle G D & (SRL)-7.0%
MCI Communications (MCIC.)-5.8%
Bank One Corp. (ONE)-5.5%

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

‹ January 11, 1984 · Every January 12 · January 13, 1984 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.