The USDHKD is the forex quote for the US dollar against the Hong Kong dollar. The Hong Kong dollar is the third most traded currency in Asia. Just like the Singapore dollar, the Hong Kong dollar is based on a linked exchange rate system to the US dollar, meaning it's not a free floating currency but instead trades within a band. Due to its easily predictable rate fluctuations, it is considered a safe currency pair to trade and is best traded during the Asian trading session. Economical and political environments in the USA and Hong Kong, financial policy of FRS and HKMA, among other factors influence the performance of the pair.