Harris Associates, the investment advisor to the Oakmark International Small Cap Fund, announced today that with the fund topping $325 million in assets, it will close to new investors as of May 10. Existing shareholders, however, may continue to purchase additional shares and reinvest dividends and capital gains.

"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 Morningstar. By comparision, the S&P 500 is down 6.2% for the same period year to date, and down 12.9% for the one year trailing, according to Morningstar.

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