Mortgage rates fell in two weekly surveys. The Bankrate national mortgage survey reported the interest rate for a 30-year fixed-rate mortgage at 4.58%, down from 4.62% a week prior, while a survey from reported the rate at 4.55%. Freddie Mac reported Wednesday that the average rate for a 30-year FRM increased slightly to 4.4%. Bankrate's survey of large banks and thrifts showed the average 15-year FRM at 3.97%, down 5 basis points from last week. The rate for a 5-year adjustable-rate mortgage fell to 3.66% from one week earlier, while the rate for a 30-year jumbo loan fell to 5.18%. LendingTree's weekly survey gathers actual rates offered to borrowers through the company's lending network. The survey also reports the lowest rates available in every state. Florida and Delaware tied for the lowest rate offered this week at 4%. In Florida, 46.4% of borrowers are underwater, as are 13.5% of borrowers in Delaware, according to the survey. Mortgage rates offered to borrowers through LendingTree did not exceed 4.25% in any state. Write to Christine Ricciardi.