The Hong Kong dollar peg refers to the monetary policy where the Hong Kong dollar is tied to the US dollar at a fixed exchange rate, specifically around HKD 7.8 per USD. This system helps maintain currency stability and fosters investor confidence, which is essential for Hong Kong's economy, particularly as a global financial hub. The peg operates through a currency board arrangement, where the Hong Kong Monetary Authority ensures that the local currency can be exchanged for US dollars at this fixed rate.