Lending for residential investment may be bouncing back in Australian financial circles for sound reasons. Home loans for investment exhibit an appealing credit quality metric, on an industry-wide basis.Investment loans are the best, with the lowest arrears in what is mostly a prime form of credit.Moody's Investors Service included a telling chart on Australian home loan arrears in a global survey it ran earlier this year, and reported in detail at the end of last week.Baldly put, investment loan arrears are half the level of arrears seen on owner-occupied mortgages.A worried APRA put the lid on investment lending, but it's found one bounce and may well find more among mortgage funders hunting for new business.