Underfolio

Every trading day › 1984

The stock market on July 18, 1984

July 18, 1984, a Wednesday. The S&P 500 fell 0.64% to close at 151.40. Of 5,781 US stocks that traded, 1,208 rose and 1,888 fell.

The S&P 500-0.64%closed at 151.40
How big a move#10,089of 24,799 trading days since 1928
$100 in the index since$5,089price only, to September 24, 2026
Stocks that rose1,208of 5,781; 1,888 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for2stocks

Biggest rises among the 500 largest companies

Warner Communications (WCI)+9.4%
Avco Corp+7.5%
PepsiAmericas (WH)+5.3%

Biggest falls among the 500 largest companies

Eli Lilly (LLY)-6.8%
Pharmacia (PNU)-6.7%
Computervision Corp -old (CVN)-5.0%

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

‹ July 17, 1984 · Every July 18 · July 19, 1984 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.