Homebuyers in Tampa, Kansas City (MO), Portland and New York saw the biggest mortgage rate savings by shopping around for home loans compared to buyers in other US cities, according to a new study by LendingTree. The rate spreads in the four cities are the largest for purchase-mortgage loans overall, while New Orleans, Salt Lake City and Indianapolis have the largest differences in refinance mortgage rates, the study found. Also, due to the large loan sizes, California borrowers ...