Jack Guttentag, professor of finance emeritus at the Wharton School of the University of Pennsylvania, advises borrowers to ignore the CFPB’s controversial online rate checker tool. “It is completely useless,” he asserted in a recent online blog post. “The tool a borrower needs is a ‘shopping rate,’ a rate that a competing lender should match or better. The CFPB shows a distribution of rates, and leaves it to the shopper to decide which rate in the distribution is the shopping rate, while providing no guidance on how to do it.” For example, given the loan features he entered on Feb. 10, the CFPB tool told Guttentag that, “In Pennsylvania, most lenders in our data are offering rates at or below ...