STOCKHOLM--(BUSINESS WIRE)--Northern Trust (Nasdaq: NTRS) today announced that it has retained and expanded its mandate with AMF Tjänstepension AB (AMF), a leading Swedish pension provider. Under the renewed agreement, Northern Trust, which has serviced AMF for more than 20 years, will continue to serve as custodian for AMF's global pension assets and add investment operations for trade services across AMF's total portfolio, for both pension and fund company assets. AMF is one of Sweden's leadi. ...