According to the HKMA, the latest intervention will lift the aggregate balance - the sum of balances on clearing accounts maintained by banks with the authority - to HK$395.143 billion on Oct. 20, when the injected funds will be settled.
The Hong Kong dollar is pegged at 7.8 to the US dollar, but can trade between 7.75 and 7.85. Under the currency peg, the HKMA is obliged to intervene when the Hong Kong dollar hits 7.75 or 7.85 to keep the band intact.