by Calculated Risk on 3/05/2008 12:18:00 PM

From Bloomberg: Agency Mortgage-Backed Bond Spreads Reach Highest Since 1986

The extra yield that investors demand to own so-called agency mortgage-backed securities over 10-year U.S. Treasuries rose to the highest since 1986, boosting the cost of loans for homebuyers considered the least likely to default.

The difference in yields on the Bloomberg index for Fannie Mae's current-coupon, 30-year fixed-rate mortgage bonds and 10- year government notes widened about 1 basis point, to 204 basis points, or 70 basis points higher than Jan. 15.