As they are paying in cash, what effect could it have? They would have to sell the asset to recover the investment. Unlike stocks there is no mechanism for a broker to HAVE to buy that asset and it would have to be sold in the open market. Due to it being such a small %, then it would have little effect, even at a discount.
If the Hand Send drops 2k points .......... now THAT would effect the house market but, in the case of the mainland markets, Beijing has before and will again, intervene to support or put a " new guidance " in place to do the same thing.