The average long-term US mortgage rate climbed this week to its highest level in nearly nine months, raising borrowing costs for homebuyers during what is traditionally the busiest season for the housing market, AP reported.

Mortgage rates continued to rise last week, causing more borrowers to head to adjustable-rate loans, which are cheaper but considered riskier.

The average long-term U.S. mortgage rate climbed this week to its highest level in nearly nine months, driving up borrowing costs for homebuyers during what’s traditionally the…