Mortgage Rates Lowest Since March Written by Alan Findlay on May 7, 2010. Posted in Mortgages, News U.S. mortgage rates for 30-year fixed loans dropped to 5 percent in the week ended today from 5.06 percent last week. The average 15-year rate was 4.36 percent. Read more from The Buffalo News Business Today Tags: fixed, investors, loans, Mortgages, us, USA Trackback from your site. Leave a comment Notify me of follow-up comments by email. Notify me of new posts by email. Sign me up for the investor insight newsletter!