I think it was after the close. So you can see an impact has been priced into the dual listed shares during NY trading. Using Petrochina as an example:
HK Close for 0857.hk = HKD 10.62 (equivalent to US$137.01/ADS)
Current NY quote for PTR = US$133.13
So in this case about a 3% drop is priced in. Other stocks will be impacted to varying degrees based on how much their price has been impacted by recent hot money flows.
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