Does Foreign Investment Make the U.S. Economy More Vulnerable?

Apparently the NYT believes it does. A lengthy article on the growth of Chinese foreign investment told readers:

"But the show of financial strength [foreign investment by China] also makes China — and the world — more vulnerable. Long an engine of global growth, China is taking on new risks by exposing itself to shaky political regimes, volatile emerging markets and other economic forces beyond its control.

"Any major problems could weigh on China’s growth, particularly at a time when it is al...