SAN FRANCISCO – Facebook Inc. rallied early Wednesday after the stock was upgraded late Tuesday by BTIG, but shares of LinkedIn Corp. and Yelp Inc. slipped on the two social network's quarterly reports. Facebook was up 1.3% after BTIG analyst Richard Greenfield lifted his rating to buy from neutral, pointing the company's momentum in online ads. The company was set to report results after Wednesday's closing bell. But LinkedIn shed more than 4% after reporting a weaker-than-expected outlook even though the company beat Wall Street's estimates for the third quarter. Yelp was down more than 5% after the online business reviews site reported a wider-than-expected loss and announced plans for a $250 million secondary offering. The Nasdaq Composite Index rose 0.3% to 3,965. The Philadelphia Semiconductor Index was also ahead by a fraction.
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