Underfolio

Every trading day › 1987

The stock market on August 12, 1987

August 12, 1987, a Wednesday. The S&P 500 fell 0.28% to close at 332.39. Of 6,309 US stocks that traded, 1,768 rose and 2,350 fell.

The S&P 500-0.28%closed at 332.39
How big a move#16,955of 24,799 trading days since 1928
$100 in the index since$2,318price only, to September 24, 2026
Stocks that rose1,768of 6,309; 2,350 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for4stocks

Biggest rises among the 500 largest companies

Louisiana-Pacific (LPX)+7.5%
Molex (MOLX)+7.1%
Chrysler Corp (C)+6.1%

Biggest falls among the 500 largest companies

Amax Inc. (AMX)-4.3%
Liz Claiborne (LIZ)-4.0%
Lucky Stores (LKS)-4.0%

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

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

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.