Roger Ibbotson, who's long favored equities' long-term returns over bonds, has a new "theory of...

|By:, SA News Editor

Roger Ibbotson, who's long favored equities' long-term returns over bonds, has a new "theory of everything" that has him advising two new mutual funds: Buy low liquidity. He says stocks with the lowest 25% of trading volume return 2.5%-8% more than their peers annually.