China, the only big economy promising a growth rebound this year, is again luring foreign investors. Yet the fear that Beijing may someday end up as ostracized from global markets as Russia is keeping a lid on demand.

The scale and coordination of Western sanctions on Russia triggered by President Vladimir Putin's Feb. 24 invasion of Ukraine stunned financial markets and left managers sitting on billions of dollars of assets suddenly made worthless overnight.

While such a move against China seems far-fetched given its economic size and the vast amount of foreign money invested there, it's a risk many are reluctant to ignore.