@Alwyn Lewis “Re. banks, I tend to see 'reserves' as the bank's founding deposit at the CB.” @Kevin Carney and I have discussed this prior, we all use this word reserve or reserves in banking, which has multiple meanings and thus creates enormous confusion. Yes, you are absolutely right Reserves are swapped for bank assets as founding capital. This is important because this is all reserves are, credit entries in a bank’s account on the Federal reserve’s ledger (or CB ledger), which as an institution has assets it holds against these credits. Same as bank’s crediting deposit accounts. But, the CB had no assets of its own from the Gov, no founding capital other than the assets banks contributed or deposited with it, same for Bank of England, so every Fed asset is acquired by issuing new Liabilities, or settlement balances, these reserve account credits, which are called ‘Reserves.’ This is reserves as CB Liabilities, and also bank Assets. That says, banks hold Assets in excess of their Liabilities, just as the CB does, which is excess capital, owner’s equity and in an annual basis profits. These profits or excess assets are hold ‘on reserve’ in case they are needed to fund bank liabilities. That’s not a monetary unit, that’s a measure of excess assets being held on reserve. A bank’s tier one capital ratio or CAR/capital adequacy ratio is defined by excess assets held on reserve, which can be multiple types of assets, not only reserve account credits themselves, so this is a different meaning. “So reserves in that sense are its own money, used to provide a buffer of bank-equity held in reserve against a loss of bank-equity due to borrower-default.” Yes! “I prefer the term 'settlement-balance' (which Canadians seem to use) for the bank assets that balance the bank's 'customer-deposit' book.” These same assets held at the CB are account credits and reserve account credits, true settlement balances. But assets held in reserve are not settlement balances, even though they can be liquidated to settle outstanding balances!