Wall Street tried to bounce back from last week's losses at Monday's opening bell. Stocks were higher ahead of the Federal Reserve Open Market Committee's two-day meeting that starts Tuesday. Investors are bracing to see if the central bank drops the word 'patient' from its statement on Wednesday. Facebook (FB) is clarifying to its 1.4 billion users worldwide, what is and is not acceptable to post on its site. The company released revamped guidelines on Monday detailing what content is banned from its social network. Sotheby's (BID) has a new CEO. Tad Smith left his post as co-chief executive at Madison Square Garden (MSG) to run the auction house.