The corporate credit rating of NRG Energy Inc. (NRG) is 'BB-', and the outlook is negative. On May 10, 2011, Standard&Poor's Ratings Services revised the outlook to negative from stable and affirmed the 'BB-' corporate credit rating. The corporate credit rating on NRG reflects the company's fundamental exposure to volatile commodity markets balanced by an active hedging program and ongoing efforts by the company to reduce the influence of gas price volatility on its cash flows. NRG's hedging program has been a substantial source of strength in the past three years and has allowed the company to maintain a strong financial profile in contrast to other independent power producers. The change in outlook reflects the possibility of a