Adam Bernstein has returned to Highbridge Capital to launch a new strategy based on a novel approach to sector research.Bernstein previously spent nine years at Highbridge, leaving in 2014 to launch Pagoda Asset Management with two colleagues. Largely because of the Highbridge pedigree, Pagoda attracted strong investor demand, and was managing more than $500 million at yearend 2017. But after two years of middling returns, Bernstein abruptly...