Margin Operations Purpose Guide the understanding and management of margin lending, margin requirements, and margin call operations in brokerage and advisory settings. Covers Regulation T initial margin, FINRA/exchange maintenance margin, portfolio margin methodology, margin call types and procedures, forced liquidation processes, securities-backed lines of credit (SBLOC), and margin risk management. Enables building or evaluating margin systems and understanding margin impact on portfolio management and client accounts. Layer 11 — Trading Operations (Order Lifecycle & Execution) Direction bo…