The market pullback came as investors looked ahead to a busy week of economic reports and an interest rate policy update from the Federal Reserve. The market also remained focused on developments in the U.S.-China trade negotiations ahead of new tariffs on Chinese goods scheduled to kick in on Sunday.
The S&P 500 index lost 9.95 points, or 0.3%, to 3,135.96.
The Dow Jones Industrial Average fell 105.46 points, or 0.4%, to 27,909.60.
The Nasdaq dropped 34.70 points, or 0.4%, to 8,621.83.
The Russell 2000 index of smaller company stocks gave up 4.22 points, or 0.3%, to 1,629.62.
For the year:
The S&P 500 is up 629.11 points, or 25.1%.
The Dow is up 4,582.14 points, or 19.6%.
The Nasdaq is up 1,986.55 points, or 29.9%.
The Russell 2000 is up 281.06 points, or 20.8%.