What Is the Difference between an Equity Margin Call and a Portfolio Margin Call?
An equity margin call occurs in a standard margin account when the total equity falls below the maintenance margin level. A portfolio margin call, however, occurs within a portfolio margining system, which assesses risk based on the net risk of the entire portfolio.
A portfolio margin call is triggered if the calculated risk-based margin requirement for the whole portfolio is no longer met by the available equity.
