The average rate on a 30-year U.S. mortgage edged higher this week, though it remains relatively near its low point so far this year.

The uptick brings the average long-term mortgage rate to 6.22% from 6.19% last week, the Federal Home Loan Mortgage Corporation mortgage buyer, Freddie Mac, said Thursday. A year ago, the rate averaged 6.6%.

Borrowing costs on 15-year fixed-rate mortgages, popular with homeowners refinancing their home loans, also rose this week.

The rate averaged 5.54%, up from 5.44% last week. A year ago, it averaged 5.84%, Freddie Mac said.

Mortgage rates are influenced by several factors, from the Federal Reserve's interest rate policy decisions to bond market investors' expectations for the economy and inflation. They generally follow the trajectory of the 10-year T

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