Underfolio

Every trading day › 1984

The stock market on October 17, 1984

October 17, 1984, a Wednesday. The S&P 500 fell 0.39% to close at 164.14. Of 5,756 US stocks that traded, 1,514 rose and 1,621 fell.

The S&P 500-0.39%closed at 164.14
How big a move#14,625of 24,799 trading days since 1928
$100 in the index since$4,694price only, to September 24, 2026
Stocks that rose1,514of 5,756; 1,621 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock

Biggest rises among the 500 largest companies

Reynolds Metals (RLM)+5.7%
US Airways Group (U)+5.5%
American Airlines Group (AMR)+4.9%

Biggest falls among the 500 largest companies

Amerada Hess (AHC)-6.6%
Gould Inc (GLD)-6.0%
Atlantic Richfield (ARCO) (ARC)-5.6%

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

‹ October 16, 1984 · Every October 17 · October 18, 1984 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.