Underfolio

Every trading day › 1984

The stock market on April 23, 1984

April 23, 1984, a Monday. The S&P 500 fell 0.77% to close at 156.80. Of 5,741 US stocks that traded, 1,207 rose and 2,059 fell.

The S&P 500-0.77%closed at 156.80
How big a move#8,351of 24,799 trading days since 1928
$100 in the index since$4,913price only, to September 24, 2026
Stocks that rose1,207of 5,741; 2,059 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for2stocks

Biggest rises among the 500 largest companies

KeySpan (KSE)+10.2%
Mesa Inc (MXP.)+7.2%
Broadway Stores Inc (BWY)+5.8%

Biggest falls among the 500 largest companies

Chubb (CB)-8.4%
Grumman Corp. (GQ)-6.3%
Warner Communications (WCI)-5.9%

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

‹ April 19, 1984 · Every April 23 · April 24, 1984 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.