BUFFETT: There's one 'terrible mistake' long-term investors are making

Warren Buffett said in his annual letter the practice of managing portfolio risk using a specified ratio of bonds-to-stocks is flawed. The Berkshire Hathaway chief argues a diversified portfolio of equities progressively becomes less risky than bonds over an extended period. Warren Buffett wants to dispel a common investing myth. In his most recent annual letter, the billionaire investor and Berkshire Hathaway chief says investors who measure the risk of their portfolios using a...