The agency has kept India's credit rating unchanged at 'BBB-' -- the lowest investment grade rating -- since August 2006. Fitch Ratings on Tuesday affirmed India's sovereign rating with a stable outlook saying the country has a robust growth outlook and resilient external finances. "Fitch Ratings has affirmed India's Long-Term Foreign-Currency Issuer Default Rating (IDR) at 'BBB-' with a Stable Outlook," it said in a statement, adding strong growth potential is a key supporting factor for the sovereign rating. Fitch Ratings has affirmed India's Long-Term Foreign-Currency Issuer Default Rating (IDR) at 'BBB-'(Reuters) Fitch Ratings has affirmed India's Long-Term Foreign-Currency Issuer Default Rating (IDR) at 'BBB-'(Reuters) Also read: India services PMI for April climbs to 13-year high of 62 "India's rating reflects strengths from a robust growth outlook compared with peers and resilient external finances, which ha...