Haverhill (Mass.) Retirement System is searching for a manager to run about $5 million in active domestic high-yield fixed income, a new asset class for the $145 million pension fund, said Bart Earley, senior investment analyst with consultant Wainwright Investment Counsel. The portfolio will be benchmarked to the Lehman Brothers High-Yield bond index. Plan officials want to diversify, he said. Funding will come from other fixed-income portfolios; no managers will be terminated. Kathleen Gallant, the plan's administrator, referred all questions to the consultant.