Use of Benninga-Sarig to Estimate Debt Betas in a Valuation Engagement In the July 8, 2016 In re Appraisal of DFC Global Corp. Opinion (DFC Opinion), the Court of Chancery of the State of Delaware suggested that debt betas should be estimated for individual companies and it cited Pratt and Grabowski’s Cost of Capital as a source for debt betas based on the firm’s credit rating. In addition, the Court also a ...