Freddie Mac, the federally chartered mortgage investor, aggregates rates from around 80 lenders across the country to come up with weekly national average mortgage rates. It uses rates for high-quality borrowers who tend to have strong credit scores and large down payments. These rates are not available to every borrower.
The 15-year fixed-rate average slid to 2.51 percent with an average 0.7 point. It was 2.54 percent a week ago and 3.20 percent a year ago. The five-year adjustable rate average fell to 2.94 percent with an average 0.4 point. It was 3.09 percent a week ago and 3.46 percent a year ago.
https://www.washingtonpost.com/business/2020/07/30/mortgage-rates-fall-below-3-percent-again/