Many borrowers could have seen significant savings on the interest rate on a mortgage if they shopped around, according to a working paper published by the Consumer Financial Protection Bureau’s Office of Research. The bureau economists noted that close to half of consumers didn’t shop before taking out a mortgage, based on the National Survey of Mortgage Originations, a representative survey conducted by the CFPB and the Federal Housing Finance Agency. And only 16.0 percent of borrowers considered three or more lenders before obtaining a mortgage. The economists said...