A veteran analyst says he was stunned by Warren Buffett's decision to step down as Berkshire Hathaway CEO this year — and told Business Insider what he expects to change under his successor, Greg Abel. "I was shocked," Meyer Shields, a managing director at Keefe, Bruyette & Woods who's been covering Berkshire for more than 15 years, said in an interview. Shields didn't see Buffett's resignation coming because the famed investor had "frequently talked" about wanting to stay in the top job as long as possible ...