Freddie Mac's results of its Primary Mortgage Market Survey® shows that "

The 30-year fixed-rate mortgage rate saw little change again this week and averaged just 3.9% during 2019, the fourth lowest annual average since 1971 when Freddie Mac started its weekly survey.

Heading into 2020, low mortgage rates and the improving economy will be the major drivers of the housing market with steady increases in home sales, construction and home prices. While the outlook for the housing market is bright, worsening housing affordability is no longer a coastal phenomenon and is spreading to many interior markets and it is a threat to the continued recovery in housing and the economy."

• 30-year fixed-rate mortgage (FRM) averaged 3.74 percent with an average 0.7 points for the week ending December 26, 2019, up from last month when it averaged 3.66 percent. A year ago, at this time, the 30-year FRM averaged 4.55 percent.

• 15-year FRM this week averaged 3.19 percent with an average 0.7 points, up from last month when it also averaged 3.15 percent. A year ago, at this time, the 15-year FRM averaged 4.01 percent.

• 5-year Treasury-indexed hybrid adjustable-rate mortgage (ARM) averaged 3.45 percent this week with an average 0.3 points, up from last month when it averaged 3.39 percent. A year ago, at this time, the 5-year ARM averaged 4.00 percent.