Underfolio

Every trading day › 1987

The stock market on May 12, 1987

May 12, 1987, a Tuesday. The S&P 500 rose 0.59% to close at 293.30. Of 6,161 US stocks that traded, 1,680 rose and 2,303 fell.

The S&P 500+0.59%closed at 293.30
How big a move#10,845of 24,799 trading days since 1928
$100 in the index since$2,627price only, to September 24, 2026
Stocks that rose1,680of 6,161; 2,303 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Sun Microsystems (SUNW)+8.3%
Seagate Technology (SEG)+8.2%
Litton Industries (LIT)+4.9%

Biggest falls among the 500 largest companies

Amax Inc. (AMX)-8.1%
Willamette Industries (WLL)-5.9%
Charming Shoppes Inc (CHRS)-5.6%

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

‹ May 11, 1987 · Every May 12 · May 13, 1987 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.