Further to yesterday's action that I reported here

  • another HK$ 4.26bln sold today to add to yesteday's HK$ 6.59bln to ensure trading band intact

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