Stocks dropped on Friday after the latest producer price index data came in much hotter than expected, adding sticky inflation to a list of concerns that has caused market turbulence this month.

The Dow Jones Industrial Average

dropped 521.28 points, or 1.05%, to close at 48,977.92. The S&P 500

closed down 0.43% at 6,878.88, while the Nasdaq Composite

lost 0.92% to settle at 22,668.21.