China is more heavily invested in the US than the US in China. A Rhodium Group report estimated that by the end of 2020 US residents had claims on about 1.2 trn USD and Chinese residents on about 2.12 trn USD worth of debt and equity securities.
Some 1 trn USD of Chinese portfolio claims on the US are Chinese government holdings of US treasuries. In addition, many Chinese companies have listed their stock on US exchanges. In 2020, 217 Chinese firms with a total market capitalization of 2.2 trn USD were listed on the NYSE, the tech companies Alibaba and Tencent included. Chinese firms have different objectives when listing there, though most commonly to meet USD financing needs and to secure higher stock-market valuations.
Foreign direct investment (FDI) is also high. In this case, the US has invested more in China in the past 30 years than China in the US. There are many reasons for this – for example, China’s capital controls that deter citizens from buying assets abroad and US investment screening. The US Congressional Research Service puts cumulative FDI since 1990 at 258 bn USD from US and 152 bn from China.