U.S. stocks open higher, with the S&P 500 extending gains this week

U.S. stocks opened higher Tuesday, with the S&P 500 up modestly, as investors await economic data on the housing market and remarks from Federal Reserve officials. The Dow Jones Industrial Average
DJIA,
-0.34%
was up less than 0.1% soon after the opening bell, while the S&P 500
SPX,
+0.05%
gained 0.4% and the Nasdaq Composite
COMP,
+0.51%
advanced 0.7%, according to FactSet data, at last check. Investors will see data for existing home sales in July at 10 a.m. Eastern Time, while Fed Gov. Michelle Bowman and Chicago Fed President Austan Goolsbee are scheduled to speak at 2:30 p.m. Eastern Time. The S&P 500 ended Monday higher, after three straight weekly declines.