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Honeymoon is over for Mayer: Pro

11:05 AM ET Wed, 29 Jan 2014

Bethany McLean, Vanity Fair contributing editor, and Jason Helfstein, Oppenheimer & Co. managing director of internet equity research, discuss Yahoo's relationship with Alibaba and what CEO Marissa Mayer needs to do to fix their core business. CNBC's Jon Fortt provides insight.