Underfolio

Every trading day › 1984

The stock market on October 4, 1984

October 4, 1984, a Thursday. The S&P 500 rose 0.30% to close at 162.92. Of 5,762 US stocks that traded, 1,596 rose and 1,516 fell.

The S&P 500+0.30%closed at 162.92
How big a move#16,636of 24,799 trading days since 1928
$100 in the index since$4,729price only, to September 24, 2026
Stocks that rose1,596of 5,762; 1,516 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for3stocks

Biggest rises among the 500 largest companies

Tandem Computers Inc (TDM.)+6.7%
Kerr-McGee (KMG)+5.8%
Price Co (PCLB)+3.9%

Biggest falls among the 500 largest companies

Walt Disney (DIS)-7.0%
Avnet (AVT)-6.2%
Safeway (SWY)-6.0%

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

‹ October 3, 1984 · Every October 4 · October 5, 1984 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.