Mortgage rates increased for the third consecutive week, climbing 11 basis points to 4.58 percent. Rates are now at their highest level since the week of August 22, 2013. Higher Treasury yields, driven by rising commodity prices, more Treasury issuances and the steady stream of solid economic news, are behind the uptick in rates over the past week.

Treasury yields rose ahead of the release of the Fed’s Beige Book and speeches from New York Fed President William Dudley and Fed Governor Randal Quarles. Following Treasurys, mortgage rates soared. The U.S. weekly average 30-year fixed mortgage rate rose 5 basis points to 4.47 percent in this week’s survey, its highest level since January of 2014 and the largest weekly increase since February of this year.

Mortgage rates have been holding steady over the past two months. The U.S. weekly average 30-year fixed mortgage rate was 4.42 percent in this week’s survey. Rates have bounced around 4.4 percent since mid-February. Rates could break out and head higher if inflation continues to firm.