The Market Composite Index, a measure of mortgage loan application volume, for the week ending Aug. 11, was up 1.4 percent one week earlier, The Mortgage Bankers Association reported today. The refinance share of mortgage activity increased to 39.6 percent of total applications for the week ending Aug. 11 from 38 percent the previous week. The adjustable-rate mortgage share of activity hit the lowest level since February 2004, declining to 27.2 percent of total applications from 27.6 percent the previous week.