Chinese global foreign direct investment (FDI) declined in 2017 for the first time after five consecutive years of mostly double digit growth. According to data collected by the American Enterprise Institute (AEI), Chinese FDI in 2017 decreased by 2.16%, compared to 2016's total. This decline may partly be explained by the capital restrictions that limited outbound FDI implemented in November 2016 and August 2017. Despite the slight drop, China remains a major source for global investment. According to the CIA World Factbook, China ranks fourth for countries by FDI abroad, with a total stock of US$ 3.1 trillion as of 2017.