Underfolio

Every trading day › 1987

The stock market on April 20, 1987

April 20, 1987, a Monday. The S&P 500 fell 0.29% to close at 286.09. Of 6,138 US stocks that traded, 1,780 rose and 2,206 fell.

The S&P 500-0.29%closed at 286.09
How big a move#16,866of 24,799 trading days since 1928
$100 in the index since$2,693price only, to September 24, 2026
Stocks that rose1,780of 6,138; 2,206 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Dome Mines (DM)+6.3%
Santa Fe Pacific Corp. (SFX)+6.0%
Himont Inc (HMT)+4.9%

Biggest falls among the 500 largest companies

Deluxe Corporation (DLX)-6.6%
Entergy (ETR)-5.2%
Tandem Computers Inc (TDM.)-5.2%

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

‹ April 16, 1987 · Every April 20 · April 21, 1987 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.