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Short Strangles Portfolio Margin

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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