Warren Buffett's decision to retire 'shocked' this analyst. He predicts these changes once the investor steps down

Warren Buffett speaks onstage during Fortune's Most Powerful Women Summit at the Mandarin Oriental Hotel on October 13, 2015 in Washington, DC. Paul Morigi/Getty Images Veteran analyst Meyer Shields said he was "shocked" by Warren Buffett's decision to retire. Shields expects Berkshire Hathaway to…