NEWYORK(Reuters)-StockssaggedonTuesdayasinvestorspausedafteraseven-sessionstringofgains,sendinglarge-captechnologyshareslower.Investors'confidencehasgrowninrecentmonths,leadingtoagainofmorethan10percentfortheyearbytheDowandnearly9percentbytheS&P500.SignsofimprovementintheeconomyandtheFederalReserve'squantitativeeasinghavehelpedtodrivetheadvance.HeadingintoTuesday,boththeDow...