CHICAGO--(BUSINESS WIRE)--Fitch Ratings has placed the 'BB-' Issuer Default Rating (IDR) assigned to DISH Network Corporation (DISH) and its wholly owned subsidiary, DISH DBS Corporation (DDBS), on Rating Watch Negative. Fitch also has placed DDBS' senior unsecured issue ratings on Rating Watch Negative. DISH had approximately $13.8 billion of debt outstanding at June 30, 2015. The Negative Watch reflects the uncertainty surrounding DISH's funding strategy and potential negative effect on DISH'