It was a mixed and largely directionless week for mortgage applications as the volume of applications for home purchases inched up fractionally while applications for refinancing fell. The Mortgage Bankers Association said its Market Composite Index, a measure of loan application volume was down slightly during the week ended July 25 on both a seasonally adjusted and a non-adjusted basis with the former decreasing 2.2 percent and the latter 2.0 percent compared to the previous week.