The Hong Kong dollar (Chinese: 港元, sign: HK$; code: HKD) is the official currency of Hong Kong. It is divided into 100 cents. Historically, it was also divided into 1000 mils. The Hong Kong Monetary Authority is the monetary authority of Hong Kong and the Hong Kong dollar. Three commercial banks are licensed by the Hong Kong Monetary Authority to issue their own banknotes for general circulation in Hong Kong. These banks, HSBC, Bank of China, and Standard Chartered, issue their own designs of banknotes in denominations of HK$20, HK$50, HK$100, HK$150, HK$500, and HK$1000, with all designs being similar to one another in the same denomination of banknote. However, the HK$10 banknote and all coins are issued by the Government of Hong Kong. As of April 2019, the Hong Kong dollar was the ninth-most traded currency in the world. Hong Kong uses a linked exchange rate system, trading since May 2005 in the range US$1:HK$7.75–7.85. Apart from its use in Hong Kong, the Hong Kong dollar is also used in neighbouring Macau. It is pegged at 1 Hong Kong dollar to 1.03 Macanese patacas, and is generally accepted at par or MOP 1.00 for retail purchases.