Jeff Higgins has been released from J.P. Morgan Securities, where he was a senior high-yield trader, according to traders on the buy-side and at rival firms. Prior to joining J.P. Morgan, Higgins was a high-yield trader at Banc of America Securities and a government bond trader at Merrill Lynch. Scott Dolph, co-head of high-yield trading at J.P. Morgan, declined comment, and Higgins could not be reached.