Which of the following statements is not true?

A Bank's primary reserves are short-term assets that can provide the bank with additional liquidity while safely earning some interest income

B Bank liquidity refers to the bank's ability to accommodate deposit withdrawals and loan requests, and pay off other liabilities as they come due

C Higher concentration ratios imply higher correlation among default rates for banks' loan portfolio

D Value at riskVARis a common approach to assessing risk in financial firm's trading accounts