|Initial Margin||Maintenance Margin|
|Share CFDs||1.25 x Maintenance Margin||Risk-based calculation described below (minimum 10%)|
We establish a risk-based margin for each CFD individually, based on the observed historical volatility of the underlying share. Specifically, we calculate five historical standard deviations (based on 30 days' price history) to determine the standard maintenance margin, subject to a minimum margin of 10% (without correlation-based off-sets). The resultant margin rates apply position by position. In the majority of cases the minimum margin of 10% is applied.
In certain cases IB may, at its discretion, establish special margin rates for individual CFDs that are higher than those indicated by our standard methodology.
The following house charges may apply in addition to standard margins: