The average long-term U.S. mortgage rate eased this week from its highest level in nine months, welcome relief for prospective homebuyers.

The benchmark 30-year fixed rate mortgage rate fell to 6.48% from 6.53% last week, mortgage buyer Freddie Mac said Thursday. The average rate remains below 6.85%, where it was a year ago.

When mortgage rates decline they give homebuyers more purchasing power.

Rates have been mostly trending higher since the war with Iran began, disrupting the passage of tankers ferrying crude oil from the Persian Gulf to customers worldwide. That’s sent oil prices sharply higher — a key driver of inflation.

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.