Mortgage applications decreased 1.5% from one week earlier, according to data from the Mortgage Bankers Association’s Weekly Mortgage Applications Survey for the week ending May 15, 2015.

The Market Composite Index, a measure of mortgage loan application volume, decreased 1.5% on a seasonally adjusted basis from one week earlier. On an unadjusted basis, the Index decreased 2% compared with the previous week.

The Refinance Index increased 0.3% from the previous week. The seasonally adjusted Purchase Index decreased 4% from one week earlier, to the lowest level since April. The unadjusted Purchase Index decreased 4% compared with the previous week and was 11% higher than the same week one year ago.

“Mortgage rates increased last week, and Treasury rates increased to a recent high at mid week before falling at the end of the week. Overall purchase activity fell for the week, along with conventional refinance volume, but government refinance volume increased. The level of purchase applications remained 11% higher than the same week last year, but the drop this week may indicate borrowers being wary of the recent run up in mortgage rates,” said Mike Fratantoni, MBA’s chief economist.

The refinance share of mortgage activity increased to 52% of total applications from 51% the previous week. The adjustable-rate mortgage (ARM) share of activity increased to 6.4% of total applications.

The average contract interest rate for 30-year fixed-rate mortgages with conforming loan balances ($417,000 or less) increased to 4.04%, its highest level since December 2014, from 4.00%, with points decreasing to 0.32 from 0.36 (including the origination fee) for 80% loan-to-value ratio (LTV) loans. The effective rate increased from last week.

The average contract interest rate for 30-year fixed-rate mortgages with jumbo loan balances (greater than $417,000) increased to 4.04% from 3.99%, with points decreasing to 0.25 from 0.33 (includingtheoriginationfee)for80percentLTVloans. Theeffectiverateincreasedfromlastweek.

The average contract interest rate for 30-year fixed-rate mortgages backed by the FHA increased to 3.80% from 3.76%, with points decreasing to 0.06 from 0.14 (including the origination fee) for 80% LTV loans. The effective rate increased from last week.

The average contract interest rate for 15-year fixed-rate mortgages increased to 3.26% from 3.23%, with points decreasing to 0.30 from 0.40 (including the origination fee) for 80% LTV loans. The effective rate remained unchanged from last week.

The average contract interest rate for 5/1 ARMs decreased to 2.99% from 3.00%, with points decreasing to 0.45 from 0.46 (including the origination fee) for 80% LTV loans. The effective rate decreased from last week.