U.S. stocks fell for the fourth straight session on Friday, leaving indexes with the biggest weekly losses in months. Investors sold stocks of materials, energy and industrials companies after a dramatic slide in oil and gold prices as well as disappointing earnings results from companies such as Caterpillar and Freeport McMoran Inc. Amazon.com shares soared 10% after surprise profit growth, but gains were not enough to stem selling pressure on main indexes. The S&P 500 closed 22.50 points, or 1.1%, lower at 2,079.65, booking a 2.2% weekly loss. The weekly decline for the benchmark is the steepest since March. The Nasdaq Composite dropped 57.78 points, or 1.1%, to 5,088.63, ending the week with a 2.3% weekly loss. The tech-heavy index retreated from its record closing level set on Monday. The Dow Jones Industrial Average dropped 163.39 points, or 0.9%, to 17,568.53, recording a 2.9% weekly loss.
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