* U.S. retail sales unexpectedly fall; jobless claims rise * U.S. stocks manage gains, but Cisco falls * European stocks dip * Italy's Letta announces resignation after market close * Bond prices gain By Caroline Valetkevitch NEW YORK, Feb 13 (Reuters) - World stock markets were nearly flat on Thursday as soft U.S. retail sales, considered a gauge of consumer spending, were blamed on bad weather, while the dollar fell to a two-week low against the euro. U.S. stocks


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Read more here >> Reuters | Quails