• Microsoft Corporation (NASDAQ:MSFT) plunged 1.4% following a New York Times report according to which sales of PCs based on the newly launched operating system Windows 8 were dismal

• Shares of Groupon Inc. (NASDAQ:GRPN) declined 3.9% on Monday, after it announced late Friday that it has acquired CommerceInterface, a web-based channel management firm

• Herbalife Ltd. (NYSE:HLF) fell 4.4% after it announced that a meeting with investors and analysts has been postponed to January 10, 2013. The company further added that it may raise its existing buyback limit of $50 million in upcoming quarters

• Apache Corporation (NYSE:APA) reported on Monday that its Canadian subsidiary has entered into a joint venture with Chevron Corporation’s (NYSE:CVX) Canadian subsidiary to acquire and run the Kitimat natural gas plant

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