The Market Composite Index, a measure of mortgage loan application volume, increased 1.5 percent to 639.8 on a seasonally adjusted basis for the week ending Feb. 9 compared with 630.1 one week earlier, according to a report released today by the Mortgage Bankers Association (MBA). On an unadjusted basis, the Index increased 4.5 percent for the week ending Feb. 9 compared with the previous week and was up 10.9 percent compared with the same week one year earlier.