Underfolio

Every trading day › 1987

The stock market on February 17, 1987

February 17, 1987, a Tuesday. The S&P 500 rose 2.07% to close at 285.49. Of 6,070 US stocks that traded, 2,589 rose and 1,433 fell.

The S&P 500+2.07%closed at 285.49
How big a move#1,559of 24,799 trading days since 1928
$100 in the index since$2,699price only, to September 24, 2026
Stocks that rose2,589of 6,070; 1,433 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Seagate Technology (SEG)+11.2%
Piedmont Aviation Inc+10.6%
Pfizer (PFE)+8.1%

Biggest falls among the 500 largest companies

Home Shopping Network-11.1%
Texaco (TX)-5.6%
Louisiana-Pacific (LPX)-5.2%

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

‹ February 13, 1987 · Every February 17 · February 18, 1987 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.