U.S. stocks rallied to session highs by the close of a low-volume trading session Friday, cementing the fifth week of gains for the Dow Jones Industrial Average and S&P 500, and the Nasdaq Composite's fourth weekly rise. Led by Hewlett-Packard Co. , the Dow average ended up 42.76 points, or 0.3%, to 13,207.95. It rose 0.9% for the week. The S&P 500 gained 3.07 points, or 0.2%, to 1,405.87, up 1.1% for the week. The Nasdaq Composite rose 2.22 points, or 0.1%, to 3,020.86, rising 1.8% for the week. Stocks had faltered early on but then rebounded, helped by expectations for more global central-bank stimulus.

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