Depending in the leverage they used for betting against the HKD these people might be at a serious risk of loosing everything they put there in case the trend doesn't suddenly change or if they don't get enough money from other sources to hold their leverage.
Depending in the leverage they used for betting against the HKD these people might be at a serious risk of loosing everything they put there in case the trend doesn't suddenly change or if they don't get enough money from other sources to hold their leverage.