This is a very interesting fund. September commentaries say: ...".over the past 2.5 years, the period roughly corresponding to Cedar Street’s management of the fund, it has been the best performing international small cap fund in existence."
On the other hand, M* gives them 5 stars but Negative rating. It is quite possible that M* gives negative ratings without full understanding of the funds. But, if I am not mistaken, Oakmark International Small Cap beats Harbor International Small Cap for the last 3 years, 2.5 years, and 1 year. And for the last 3 years WIGTX decimated both of these funds.