Infosys (INFY) +5.2% following news co-founder Narayana Murthy is once more chairman. An upgrade to Buy from BofA/Merrill can't be hurting either. Murthy, Infosys' CEO from 1981 to 2002 and chairman from 2002 to 2011, played a pivotal role in the IT outsourcing giant's rise. JPMorgan sees his comeback strengthening Infosys' push to expand into high-margin consulting services as demand for basic outsourcing work slumps. Others, however, think it highlights a leadership vacuum.