options trading education by SJ Options
09
Jul
Short Strangles and Portfolio Margin, A Death Trap? Customer Portfolio Margin (CPM) What is CPM? CPM is a margin methodology in which the margins are supposed to be based on risk. The standard risk model used to calculate these risk-based margins is called the TIMS (Theoretical Intermarket Margin System). TIMS was developed by the OCC (Options Clearing […]
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