Stock Market

US stocks broke a four-day winning streak on Monday after a prominent analyst revived worries over the health of banks and the potential collapse of a take-over of Sun Microsystems bruised sentiment in the technology sector. Bank shares slipped after veteran analyst Mike Mayo, of Calyon Securities, said banks still face fallout from excessive risk-taking and warned of rising loan losses by the end of 2010. He rated a number of big and regional banks at "underperform" or "sell."