We expect KeySpan Gas East's financial performance to weaken over time, largely as a result of the company's inability to earn in excess of authorized returns on a consistent basis going forward. We are affirming our 'A' issuer credit rating on KeySpan Gas East Corp. and we are revising the outlook on the company to negative from stable The outlook revision reflects the potential for lower ratings by as much as one notch absent indications that the company will be able to maintain its historical levels of financial performance while consistently earning at levels above its authorized returns. The ratings on National Grid North America Inc. remain unaffected. On Feb. 27, 2015, Standard&Poor's Ratings Services affirmed its 'A'
