Underfolio

Every trading day › 1997

The stock market on August 20, 1997

August 20, 1997, a Wednesday. The S&P 500 rose 1.44% to close at 939.35. Of 7,469 US stocks that traded, 3,910 rose and 2,244 fell.

The S&P 500+1.44%closed at 939.35
How big a move#3,344of 24,799 trading days since 1928
$100 in the index since$820price only, to September 24, 2026
Stocks that rose3,910of 7,469; 2,244 fell
Biggest companyGeneral Electricby market value that day
Last day of trading for2stocks

Biggest rises among the 500 largest companies

KLA Corporation (KLAC)+9.1%
Parametric Techn (PMTC)+8.0%
Tandem Computers Inc (TDM.)+7.5%

Biggest falls among the 500 largest companies

Analog Devices, Inc. (ADI)-3.6%
Corning (GLW)-2.7%
Wyeth (AHP)-2.5%

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

‹ August 19, 1997 · Every August 20 · August 21, 1997 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.