Underfolio

Every trading day › 1991

The stock market on September 17, 1991

September 17, 1991, a Tuesday. The S&P 500 fell 0.07% to close at 385.50. Of 5,729 US stocks that traded, 1,630 rose and 1,873 fell.

The S&P 500-0.07%closed at 385.50
How big a move#22,675of 24,799 trading days since 1928
$100 in the index since$1,998price only, to September 24, 2026
Stocks that rose1,630of 5,729; 1,873 fell
Biggest companyExxon Mobilby market value that day
Last day of trading for2stocks

Biggest rises among the 500 largest companies

Merrill Lynch (MER)+6.4%
Freeport-McMoran (FTX)+5.9%
Quaker Oats (OAT.)+5.4%

Biggest falls among the 500 largest companies

Tandem Computers Inc (TDM.)-6.1%
McCormick (MKC)-4.7%
Centocor Inc (CNTO.)-4.3%

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

‹ September 16, 1991 · Every September 17 · September 18, 1991 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.