The average long-term U.S. mortgage rate edged up for the second week in a row, but remains just above its lowest level in more than three years.

The benchmark 30-year fixed rate mortgage rate rose to 6.1% from 6.09% last week, mortgage buyer Freddie Mac said Thursday. One year ago, the rate averaged 6.95%.

Borrowing costs on 15-year fixed-rate mortgages, popular with homeowners refinancing their home loans, also rose this week. That average rate inched up to 5.49% from 5.44% last week. A year ago, it was at 6.12%, 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 Treasury yield, which lenders use as a guide to pricing home loans.

The 10-year Treasury yield was at 4.24% at midday Thursday, just below where it was a week ago.