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Today's Mortgage Rates -- September 22, 2021: Rates Up Again for 2 Popular Loans

On Sept. 22, 2021, average mortgage rates are up again for the 15-year and 30-year fixed-rate loans and down for the 20-year fixed loan and 5/1 ARM. The interest rate charged on a mortgage determines the cost to borrow and ultimately plays a key role in determining how much a home costs over time.