Underfolio

Every trading day › 1987

The stock market on January 12, 1987

January 12, 1987, a Monday. The S&P 500 rose 0.61% to close at 260.30. Of 6,011 US stocks that traded, 2,661 rose and 1,374 fell.

The S&P 500+0.61%closed at 260.30
How big a move#10,651of 24,799 trading days since 1928
$100 in the index since$2,960price only, to September 24, 2026
Stocks that rose2,661of 6,011; 1,374 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Halliburton (HAL)+9.4%
Metaldyne Corp+9.1%
Wang Labs Inc (WANG)+8.9%

Biggest falls among the 500 largest companies

Owens-Illinois (OI)-7.5%
Archer Daniels Midland (ADM)-5.8%
Hercules (HPC)-4.3%

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

‹ January 9, 1987 · Every January 12 · January 13, 1987 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.