Underfolio

Every trading day › 1985

The stock market on December 18, 1985

December 18, 1985, a Wednesday. The S&P 500 fell 0.40% to close at 209.81. Of 5,754 US stocks that traded, 1,456 rose and 2,197 fell.

The S&P 500-0.40%closed at 209.81
How big a move#14,397of 24,799 trading days since 1928
$100 in the index since$3,672price only, to September 24, 2026
Stocks that rose1,456of 5,754; 2,197 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for4stocks

Biggest rises among the 500 largest companies

Polaroid (PRDCQ)+8.4%
Apple (AAPL)+7.9%
G-I Holdings Inc+7.7%

Biggest falls among the 500 largest companies

Pan Am Corp-6.3%
7-Eleven Inc (SE)-5.8%
Pennzoil (PZE)-5.2%

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

‹ December 17, 1985 · Every December 18 · December 19, 1985 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.