This prudential deductions framework (PCD-2.4) applies to investments irrespective of their classification in banking book or trading book. Where a bank demonstrates that it is an active market maker then the CBB may, on a case by case basis, establish a dealer exception for holdings of other designated banks', securities firms', and other financial entities' capital instruments in the trading book. In order to qualify for the dealer exception, the bank must demonstrate to the CBB that it has adequate systems and controls surrounding the trading of financial institutions' eligible regulatory capital instruments.