The US Dollar / Hong Kong Dollar is the most popular pair to trade the Hong Kong currency. The Hong Kong Monetary Authority's primary objective is to ensure stability of the HKD exchange rate, instead of primarily focusing on inflation rates or growth like most central banks. Hong Kong is increasingly integrated with China, and many consider it a gateway of capital into and out of the world's second largest economy. Hong Kong exports and imports were both bigger than the size of the net GDP in 2012, and China intakes more than half of Hong Kong's exports.
The outcome of the UK Brexit referendum interrupt the Yuan’s path toward becoming a global currency and challenge the Hong Kong Dollar’s managed exchange rate regime.