Mortgage Rates Just Hit an 8-Year Low. Here’s Why They’re Not Even Lower

CNBC, Feb. 28, 2020–Diana Olick
Mortgage rates are not falling quite as fast as Treasury yields, because of the swiftness of the declines and the resulting risk to investors in mortgage-backed bonds.
https://www.cnbc.com/2020/02/28/mortgage-rates-just-hit-8-year-low.html