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Day Trader Margin System Overview

The Day Trader Margin System developed by LDB Consulting, Inc. calculates day trader margin charges according to NYSE Rule 431(f) (8), in effect on December 31st,2007. Using the "time and tick" method, the system will handle 431 or Portfolio Margin accounts which the user has identified as "pattern day traders".

Security types:

  • Common stock
  • Options

The system will:

  • Run in either Batch or Interactive mode, retaining separate results for each mode of operation
  • Permit user defined stock margin rates
  • Run in either 431 DT or Portfolio Margin DT mode
  • Apply reduced Portfolio Margin rates for certain index options
  • Export all calculated margin amounts to a CSV file
  • Allow the user to alter or add positions and run a simulated margin calculation
  • Run parallel to the OMO system when licensed as such

Licensing options:

  • Standalone DTM System
  • OMO-PLUS System. This is the DTM system licensed as an add-on to the OMO (Option Margin Optimizer) System.




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LDB Consulting, Incorporated
P.O. Box 512, Valparaiso, IN 46384-0512
Phone: (219) 477-1928 Fax: (219) 531-2643
Questions or Comments? Email CapComp@att.net