Reuters reporting
– Hong Kong Monetary Authority stepped in to sell HKD 6.59bln ( USD 850.3m)
– HKMA says the latest intervention will lift the aggregate balance ( the sum of balances on clearing accounts maintained by banks with them) to HKD 333.53bln on 16 Sept

 The Hong Kong $ is pegged at 7.8 vs USD but can trade between 7.75-7.85. However under the rules of the peg the HKMA is obliged to step in when either extreme is traded to keep the band intact