Delaware Court of Chancery Vice Chancellor Sam Glasscock III, breaking from the court’s tradition of using discounted cash flow to determine a company’s value, ruled an entertainment company’s $509 million sale price was the most relevant available evaluation method because no comparable transactions or reliable cash-flow projections exist.

Glasscock said discounted cash flow, or DCF, would be an unreliable method to value CKx Inc., an entertainment company that holds the rights to a stable of high-profile properties including the television program “American Idol.”