Facebook (NASDAQ:FB), the No. 1 social networking website, should get a boost next week when its shares are added to the leading indicator, the Nasdaq 100 Index.

Indeed, shares of the Menlo Park, Calif., website rose a quarter to $27.71 in Wednesday trading after Nasdaq OMX Group (NASDAQ:NDAQ) made the announcement late Tuesday.

Selection for an index often means that managers of mutual funds and pensions have a green light to buy shares of a company because it meets certain screening criteria.

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Facebook's initial public offering on May 17 and first chaotic public trading on May 18 remain highly controversial and are the subject of hundreds of class-action lawsuits. First priced at $38, shares have lost 27.5 percent since and traded as low as $17.55.

Facebook had no comment. The addition takes place Dec. 12, when the company will replace India's Infosys Group (NASDAQ: INFY) which plans to leave Nasdaq and relist on the New York Stock Exchange.

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