U.S. diversified stock mutual funds extended their string of losses to four weeks and 7%. Their last four-week slump was in Q3 2011, when they slid 16%. For the week, U.S. diversified stock funds were down 2.02%, led lower by large-cap growth funds’ 3.50% plunge, according to Lipper data. Bucking the downtrend with gains were small caps up 0.92%-0.35%, real estate up 1.21% and precious metals up 1.03%. The decline left U.S.