这类投资既有私人部门，也有公共部门（如国有实体 ） ， 主要购买者是三类国家：中国、印度、巴西、南非、马来西亚和韩国等新兴经济体；波斯湾富油国；以及美国和不少欧洲国家等富有的发达国家。
The investments are both private and public (for example, by state-owned entities) and come from three different groups of countries: emerging economies like China, India, Brazil, South Africa, Malaysia, and South Korea; oil-rich Gulf states; and wealthy developed economies like the United States and several European countries.