Reuters
Business
 - Yahoo to acquire Tumblr for $1.1 billion cash
 - Stock futures dip after records, acquisitions eyed
 - Dell says cannot disclose more information to Icahn yet
 - Actavis to buy Warner Chilcott in $5 billion stock deal
 - Unclear whether Fed's bond buying has helped economy: Fisher
 - Chesapeake Energy hires Anadarko executive as CEO
 - Monster machines fan out on U.S. farms facing slow sow
 - GE Capital plans to pay $6.5 billion in dividends to GE
 - EU law key to ending 'too big to fail' banks: BoE's Tucker
 - Vodafone withdraws from BT mobile partner talks: sources
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