Mortgage delinquency rates edged higher in nearly every category during the second quarter of 2006 in an industry that is seeing a flood of alternative mortgage products begin to season in a cooling housing market. According to the Inside Mortgage Finance Large Servicer Delinquency Index, the overall late payment rate spiked from 2.97 percent in the first quarter to 3.41 percent as of the end of June. That was the highest reading in the series since the end of 2005. The biggest increase in late... [Includes full-page chart.]