The November 25 release of the results of Freddie Mac’s Primary Mortgage Market Survey® (PMMS®) shows the average 30-year fixed mortgage rate declining slightly leading up to the Thanksgiving holiday. The average 30-year fixed rate mortgage hasn’t risen above 4 percent since the week of July 23rd of this year, which is helping homebuyer affordability in the face of rising house prices due to low levels of inventory in many markets.