Just as mortgage rates edge ever closer to 6%, Chase Home Lending gives you a greater advantage when refinancing your mortgage with a limited-time mortgage rate discount. MORE: See our picks for the best mortgage refinance lenders. A mortgage rate break on refinancing Chase Home Lending is offering a refinancing rate discount for two weeks, from Dec. 1 through Dec. 14. If you lock your rate during the promotional period, you will earn an interest rate reduction, which varies by loan product and location ...