By Rex Crum, MarketWatch

SAN FRANCISCO (MarketWatch) -- Gains from Oracle Corp. and losses from Facebook Inc. stood out among tech stocks Thursday after the business-software giant reported better-than-expected quarterly results and the social-networking kingpin announced a stock offering that includes a big sale by Chief Executive Mark Zuckerberg.

Oracle (ORCL) climbed by more than 4%,to $36.07 a share, after the company on Wednesday reported a fiscal second-quarter profit of $2.55 billion, or 56 cents a share, on $9.28 billion. Excluding one-time items Oracle would have earned 69 cents a share. Analysts surveyed by FactSet had forecast Oracle to earn 67 cents a share on $9.18 billion. On a conference call, Oracle Chief Executive Larry Ellison highlighted gains in the company's hardware business.

Facebook (FB), meanwhile, was off by 1.7% at $54.60. Before the market opened, Facebook said it would offer 70 million shares of company stock for sale, with 27 million shares coming from the company and the remaining 43 million from major Facebook shareholders.

And of that 43 million shares, 41.35 million will come from Facebook CEO Zuckerberg, who is selling the stock to meet tax obligations. Zuckerberg's shares are valued at about $2.3 billion.

Groupon Inc. (GRPN) shares rose 2.5%, to $11.56. The online daily-deal company on Thursday launched two offerings for last-minute Christmas shoppers, digital gift vouchers and Grouponvelope, which will let merchants offer deals similar to gift-card programs.

Among other social-media related stocks, Pandora Media Inc. (P) rose almost 4%, to $28.07, Angie's List Inc. (ANGI), was up by 3% at $13.81, and LinkedIn Corp. (LNKD) and Yelp Inc. (YELP) also advanced.

Apple Inc. (AAPL) shares were trimmed by $3.44, to slip to $547.30. On Thursday, Apple began taking orders for its new Mac Pro high-end computer.

The Nasdaq Composite Index (RIXF) fell by 13 points to 4,057. The broader stock market retreated after the release of several disappointing U.S. economic indicators.

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