NEW YORK--(BUSINESS WIRE)--The historical value of sovereign support for banks is highlighted in the June 2015 edition of Fitch Ratings' Short-Term Credit Insights newsletter. It features Fitch's shift in assumptions about the level of sovereign support for bank ratings globally, which impacts the banks' short-term ratings, in line with Fitch's review first announced in March 2014 and completed in May 2015. The newsletter's 'chart of the month' illustrates the historic rationale for Fitch's pri