Hong Kong dollar
Macau has a currency board system under which the legal tender, Macau pataca, is 100 percent backed by foreign exchange reserves, in this case currently the Hong Kong dollar. Moreover, the currency board, Monetary Authority of Macau (AMCM), has a statutory obligation to issue and redeem Macau pataca on demand against the Hong Kong dollar at a fixed exchange rate of HK$1 = MOP$1.03, and without limit.