The note-issuing banks may besue currency notes only by surrendering non-interest-bearing US dollar backing at a fixed exchange rate of 7.80. Thus the Fund enjoys the seigniorage of the currency notes.

• 发钞银行必须按7.；80的固定汇率交出无息美元保证才可发行流通纸币，因此外汇基金享有发钞利润。