Indices ended trading mixed on Thursday. The Dow stepped up while the S&P 500 and Nasdaq shed some points. UnitedHealth and McDonald’s led advancers on the Dow. In economic news, initial jobless claims decreased last week. Department of Labor data showed new claims fell 4,000 to 226,000 for the week ended March 10. On another note, import prices increased by 0.4% in February following a downwardly revised 0.8% jump in January.