let's call it international diversification

china A-share might have negative correlation with other developed markets.

I haven't confirmed this, but feel it might be true for the trailing 2 years.

我觉得中国的A股和美股关联不太大，有没有负相关不好说，等我哪天算一下看看。不过买国内A股倒是很好的hedge呢。