NRG Energy, Inc., based in Princeton, New Jersey, has the highest credit standards of all publicly-traded utilities with a CSI score of 2.40. Constellation Energy Group, Inc, based in Baltimore, Maryland, is last with a CSI score of 4.70 on a scale of 1 to 5.
In January of 2008, Constellation Energy's stock was trading at almost $100 per share, current ratio was at 1.35, well over the industry benchmark of 1.10, and operating cash flow was running at 4.4% of revenue. Less than a year later, the $20 billion utility had to be rescued by Warren Buffett.