Mortgage delinquency rates edged lower in the third quarter for most loan products and categories of late payment, although trends at individual servicers varied considerably. The weighted average delinquency rate dropped 4 basis points, to 3.26 percent for the third quarter, according to Inside Mortgage Finance’s Large Servicer Delinquency Index. The index, which is not seasonally adjusted, covered $4.49 trillion of home mortgages serviced by 25 of the largest lenders in the market. …