Wendy's/Arby's Group (WEN.N) plans to sell its struggling Arby's roast beef sandwich chain to focus on the Wendy's hamburger business, which top shareholder Nelson Peltz expects to be the company's engine of growth. Wendy's shares were up 38 cents, or 8.5 percent, at $4.85 in premarket trading. A sale of Arby's would break up a $2 billion merger that Peltz orchestrated in 2008.
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