The average rate for a 30-year fixed-rate mortgage fell to 4.34% in the week that ended April 10 from 4.41% in the prior week, according to a Thursday report from federally controlled mortgage-buyer Freddie Mac . A year ago, the 30-year rate was at 3.43%. "Mortgage rates eased a bit following the decline in 10-year Treasury yields," said Frank Nothaft, Freddie's chief economist. The average rate for the 15-year fixed-rate mortgage fell to 3.38% in the latest week from 3.47% in the prior week. Meanwhile, the rate for a 5-year Treasury-indexed hybrid adjustable-rate mortgage declined to 3.09% from 3.12%. The rate for a 1-year Treasury-indexed ARM dropped to a record low of 2.41% from 2.45% in the prior week. The 1-year ARM data go back to 1984.