The Dow Jones industrial average dropped 11 points, or 0.09%, to 13,153. The Standard & Poor's 500 Index lost 1 point, or 0.10%, to 1,401. The Nasdaq Composite Index fell 5 points, or 0.18%, to 3,013.
In the macroeconomic domain, US import prices slipped 0.2% in July, worse that the 0.1% increase expected, while prices fell by 3.2% YoY, the biggest decline since 2009.
European markets were broadly lower, with the Stoxx Europe 600 down 0.5% and on track for the first loss in six days.
Gold rose 0.3% to $1,624.80 an ounce, while crude-oil futures slumped 0.9% to $92.54 a barrel.