c0e205a4_d_Questions___Data___FINRA_org__Field_Name
[Description] The total dollar value of initial margin calls in customer accounts maintained by the correspondent or self-clearing firm, that are aged more than 5 business days past the initial call date as of the "processed date." [Questions & Responses] Does the definition of 'initial margin call' refer to Fed Calls? Yes. [Field Name] 
Aged Initial Margin Calls (RegT)
Insite Frequently Asked Questions - Data | FINRA.org