NRG, Xcel credit ratings lowered by Moody's

Moody's Investors Service said it lowered the senior unsecured debt rating of NRG Energy, Inc. to noninvestment grade B1 from Baa3.

"The ratings action reflects the company's very tight liquidity position, weaker prospective cash flow, and continued uncertainty surrounding NRG's plans to acquire generating assets of First Energy," the credit rating agency said.

Moody's