Kirby Corp , which transports petrochemicals and refined petroleum products by tank barge, said its deal to buy smaller rival K-Sea Transportation Partners will add to its per-share earnings by the high single to low double digits in 2012. Units of K-Sea leaped 29 percent to $8.35 -- above the bid price of $8.15 -- on Monday on the New York Stock Exchange. Kirby shares, which backed off from their highest levels in nearly three years to be slightly down in morning trade, inched up a percent after the company forecast profit gains from the deal.
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