Falling mortgage rates motivated an increasing number of borrowers this week to inquire about a refinance, though inquiries for purchases were also higher. Rates, however, are poised to deteriorate. Refinance activity more than doubled compared to a year ago. Despite a widening spread over conforming rates, more jumbo borrowers were out shopping for a loan.

The number of prospective borrowers who inquired about a mortgage rose 4 percent from last week, leaving the U.S. Mortgage Market Index from Mortech Inc. and Mortgage Daily for the seven days ended Feb. 3 at 270.

The index was 48 percent higher than the week ended Feb. 2, 2011.

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