
Freddie Mac released it’s Primary Mortgage Survey for the week ending March 29th,2018. It covers U.S. weekly average mortgage rates:

Mortgage rates for curent week showed a little change, according to the Primary mortgage Market Survey released by Freddie Mac.
Since the beginning of January 2018 fixed-rate mortgage was going up steady every week. For the week of January 4th,2018, 30-year fixed-rate mortgage was 3.95%. It was going up every week, up until the week of March 8th, 2018, when the rate was 4.46%.
The same happened with the 15-year fixed-rate mortgage: the week of January 4th, 15-year mortage rate was 3.38%. It was steady going up every week, when in the week of March 8th,2018 reached 3.94%.
Then finally mortgage rates declined for the first time since the begining of year 2018. For the week of March 15th,2018 fixed-rate 30-year mortgage dropped to 4.44%. And the 15-year fixed-mortgage dropped to 3.90%
So now, for the last two weeks fixed mortgage rates are steady. Last week they went up 0.01%, but this week they went down 0.01%.
For the week of March 29th, 29 30-year fixed-rate mortgage is at 4.44%. And 15-year fixed-rate mortgage is at 3.9%