The image shows the Instrument Margin Calculation Maintenance screen. The main feature of this screen is to maintain an existing margin calculation setup for a product. The mandatory fields are Module, Product, Trade Type, Clear Type, Rule Type, Rule Purpose, Margin Type, Approach, Applied From, and Currency. The other optional fields are Branch, Instrument Id, Portfolio Id, Instrument Descripiton, Portfolio Description, Risk Type, Risk Bucket, Calculation Level, Calculation Type, Calculation Method, Exposure Type, Offsetting Allowed, Multiplication Factor, Margin Applicable, Threshold Amount, and Minimum Transfer Amount. The Fields option is available in the bottom of the screen. For more information on fields, refer to the field description table.