Apa itu Loan line, collateral mirroring?

A loan line is a credit facility from a venue or its affiliate that lets an institutional client borrow assets or trade on margin beyond its deposits, against collateral and a credit assessment. Collateral mirroring is the crediting, on a venue, of a trading balance equal to collateral that the client keeps with a custodian, which is the mechanism of off-exchange settlement (Chapter 15).