"We are closing the fund to new investors as a result of strong performance and stock cash inflows," said David Herro, co-portfolio manager of the fund along with Michael Welsh. Year-to-date through May 3, the fund has returned 15.5%, and for the one year trailing, the fund is up 20.7%, according to
"Limiting asset growth allows us to maintain investment flexibility and to remain true to the fund's mandate, [which is] to invest in small-cap companies based outside of the U.S.," Herro said. "Weve closed other funds in our family before, always with our shareholders best interests in mind," he added.