Stocks sauntered to an indifferent finish Thursday, ending the four-day week on a listless note. The Nasdaq retreated 0.1%, while the S&P 500 backed off even less. The IBD 50, a proxy for leading stocks, lost 0.3%. The Dow Jones utility average led the market Thursday with a 1.4% pop. Analysts at Morningstar and Credit Suisse said the sector was undervalued.