State Street Corporation (NYSE:STT) today announced that its Collateral+ business is now operational with Acadia's Initial Margin Exposure Manager (IMEM) and Margin Manager (MM) service. This integration provides automated dispute management for initial margin agreements and electronic margin call messaging across multiple products. By leveraging IMEM & MM, State Street's Collateral+ business will now enable clients to more efficiently comply with Unclear Margin Rule (UMR) regulations, via proven industry-leading solutions.