Investment Buffett has one big investing lesson in this year's annual letter: Never borrow money to buy stocks February 24, 2018 johorbiznet Johor News Buffett has one big investing lesson in this year’s annual letter: Never borrow money to buy stocks CNBC Buffett talks earnings, investment bet and how new tax law affects Berkshire’s bottom line in annual letter Omaha World-Herald Warren Buffett letter: 3 tips for stock investors USA TODAY Full coverage Source: Investment New Feed