. these loans primarily include corporate loans purchased in the secondary market , commercial and residential mortgage loans , asset-backed loans and financing extended to institutional clients . at december 31 , 2013 , approximately 99.6% ( 99.6 % ) of institutional securities other lending activities held for investment were current ; less than 0.4% ( 0.4 % ) were on non- accrual status because the loans were past due for a period of 90 days or more or payment of principal or interest was in doubt. .