Mortgage servicers reported significant improvement in loan delinquency rates during the first quarter of 2012, although the inventory of foreclosed units remained at historically high levels. The overall delinquency rate dropped 100.3 basis points to 9.88 percent as of the end of March, according to the Inside Mortgage Finance Large Servicer Delinquency Index. That was the lowest level for the series in three years, and all 18 lenders included in the index reported lower delinquency rates than they had at the end of 2011. The biggest declines were in...(Includes two data charts)