Underfolio

Every trading day › 1979

The stock market on May 18, 1979

May 18, 1979, a Friday. The S&P 500 fell 0.01% to close at 99.93. Of 4,518 US stocks that traded, 1,497 rose and 971 fell.

The S&P 500-0.01%closed at 99.93
How big a move#24,316of 24,799 trading days since 1928
$100 in the index since$7,710price only, to September 24, 2026
Stocks that rose1,497of 4,518; 971 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Mcdermott Intl Inc (MDRIQ)+6.9%
RadioShack (TAN)+6.0%
Reliance Electric Co -old (REE)+5.8%

Biggest falls among the 500 largest companies

Cbi Industries Inc (CBI)-5.2%
Santa Fe International (SAF)-4.2%
Caesars New Jersey Inc (CJN)-3.9%

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

‹ May 17, 1979 · Every May 18 · May 21, 1979 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.