As of the end of July 2024, Hong Kong’s official foreign currency reserve assets totaled US$419.3 billion, up from US$416.3 billion at the end of June 2024. Including unsettled foreign exchange contracts, the reserves amounted to US$418.7 billion. These reserves are over five times the currency in circulation and approximately 39% of the Hong Kong dollar M3.
Resources: https://www.hkma.gov.hk/eng/news-and-media/press-releases/2024/08/20240807-3/