Underfolio

Every trading day › 1978

The stock market on October 12, 1978

October 12, 1978, a Thursday. The S&P 500 fell 0.48% to close at 104.88. Of 4,552 US stocks that traded, 1,290 rose and 1,293 fell.

The S&P 500-0.48%closed at 104.88
How big a move#12,736of 24,799 trading days since 1928
$100 in the index since$7,346price only, to September 24, 2026
Stocks that rose1,290of 4,552; 1,293 fell
Biggest companyAT&T Corporationby market value that day
Last day of trading for2stocks

Biggest rises among the 500 largest companies

Parker-Hannifin (PH)+4.5%
Armstrong Holdings (ACK)+3.9%
Griffin GAMING&ENTMT (GGE)+3.6%

Biggest falls among the 500 largest companies

Mead (MEA)-5.1%
Amf Inc (AMF)-4.2%
Providian Corp (PVN)-3.9%

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

‹ October 11, 1978 · Every October 12 · October 13, 1978 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.