Bill Miller's $1.4 billion Miller Opportunity Trust is up 7.5% so far this year and has climbed 21% in the past 12 months, according to Morningstar. And Miller isn’t alone. Some 45% of all U.S.-based actively managed stock, bond and other mutual funds were beating their benchmark indexes as of Feb. 28, Morningstar said. Read the original story from The Wall Street Journal.