BizKnowledge Watch

 Express Scripts CEO George Paz is the most valuable CEO in the U.S., according to The Chief Executive magazine’s ranking of the 10 highest performing S&P 500 CEOs. Exelon’s John W. Rowe and Priceline’s Jeffery H. Boyd occupy second and third place, respectively, in the ranking.

The ranking is based on four factors: (1) How good a company is at making real money (operating cash flow in excess of its risk-adjusted cost of capital); (2) Its prospects for continuing to make real money; (3) Its wise use of capital; and (4) How highly the market values the company’s assets.

You can view the rankings and related stories at Chief Executive’s website.