Warren Buffett, billionaire chairman of Berkshire Hathaway, Inc., has continued to express concerns about the number of municipal bankruptcies happening around the nation. In testimony before the U.S. Financial Crisis Inquiry Commission in June 2010, Buffett predicted a “terrible problem” for municipal bonds in coming years. A portion of that prediction came true on June 28 with Stockton, California becoming the largest city ever to declare bankruptcy.