The average rate on a 30-year mortgage in the U.S. eased for the third week in a row, a smidgen of relief for prospective home shoppers getting into the market before the busy spring homebuying season starts.

The average rate fell to 6.89% from 6.95% last week, mortgage buyer Freddie Mac said Thursday. A year ago, it averaged 6.64%.

Borrowing costs on 15-year fixed-rate mortgages, popular with homeowners seeking to refinance their home loan to a lower rate, also retreated this week. The average rate fell to 6.05% from 6.12% last week. A year ago, it averaged 5.9%, Freddie Mac said.

Mortgage rates are influenced by several factors, including how the bond market reacts to the Federal Reserve’s interest rate policy decisions.

The average rate on a 30-year mortgage briefly fell to a 2-year low just above 6% last September, but has been mostly rising since then, echoing a sharp rise in the 10-year Treasury yield, which lenders use as a guide for pricing home loans.