Underfolio

Every trading day › 1986

The stock market on July 18, 1986

July 18, 1986, a Friday. The S&P 500 rose 0.12% to close at 236.36. Of 5,898 US stocks that traded, 1,687 rose and 2,054 fell.

The S&P 500+0.12%closed at 236.36
How big a move#21,187of 24,799 trading days since 1928
$100 in the index since$3,259price only, to September 24, 2026
Stocks that rose1,687of 5,898; 2,054 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Newmont Gold Co (NGC)+9.7%
Eex Corp (EEX)+6.0%
Manor Care Inc-Old (MNR)+5.7%

Biggest falls among the 500 largest companies

Marathon Oil (MRO)-7.5%
Black & Decker (BDK)-6.8%
Intel (INTC)-6.7%

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

‹ July 17, 1986 · Every July 18 · July 21, 1986 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.