Underfolio

Every trading day › 1979

The stock market on October 18, 1979

October 18, 1979, a Thursday. The S&P 500 rose 0.21% to close at 103.61. Of 4,508 US stocks that traded, 1,248 rose and 1,129 fell.

The S&P 500+0.21%closed at 103.61
How big a move#18,680of 24,799 trading days since 1928
$100 in the index since$7,436price only, to September 24, 2026
Stocks that rose1,248of 4,508; 1,129 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Louisiana Land & Exploration (LLX.)+5.9%
Mitchell Energy & Devel. (MND)+5.8%
Marathon Oil Corporation (MRO)+5.7%

Biggest falls among the 500 largest companies

Emhart Corp (EMH)-4.2%
Paccar (PCAR)-3.9%

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

‹ October 17, 1979 · Every October 18 · October 19, 1979 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.