@joellewis/margin-operations

Guide margin lending, margin requirements, and margin call operations for brokerage and advisory accounts. Use when calculating Reg T initial margin or buying power, determining maintenance margin or house requirements, evaluating portfolio margin eligibility under OCC TIMS, generating or resolving margin calls (fed call, house call, exchange call, day-trade call), designing forced liquidation waterfall logic, structuring securities-backed lines of credit (SBLOC), computing margin interest impact on returns, assessing concentrated position margin, understanding pattern day trader rules, or reviewing FINRA 4210 and Reg U requirements. Also covers SMA calculations and short margin mechanics.