A Fight Over Credit Scores Turns Into All-Out War

A long-simmering battle over who controls credit scoring in America has erupted into open warfare. Fair Isaac, whose FICO score is used in about 90% of consumer-lending decisions in the U.S., announced it will double the price of its mortgage credit score to $10 next year. The company also said it will bypass the three credit-reporting firms that have supplied the data feeding into its algorithm for decades.

Equifax, Experian and TransUnion created VantageScore in 2006 as an…