The Mortgage Bankers Association application survey covers over 50% of all US residential mortgage loan applications taken by mortgage bankers, commercial banks, and thrifts. The data gives economists a look into consumer demand for mortgage loans. In a low mortgage rate environment, a trend of increasing refinance applications implies consumers are seeking out a lower monthly payment which can increase disposable income and consumer spending (or give consumers a chance to pay down other debts like credit cards). A falling trend of purchase applications indicates a decline in home buying interest, a negative for the housing industry and the economy as a whole.