Under the intense competition in mutual fund market, investment trust c ompanies work on developing new types of funds to attract the interest of investors. However, different types of mutual fund come with different rate and risk due to their different investment purposes. To achieve significant evaluation, we can only compare performance among same types of mutual fund. Besides, size effect in stockmarket has been proposed. We investigated whether size effect exists in different types of mutuals funds. This paper explore relat ed studies based on these two aspects.