In March, United States (US) President Donald Trump decided to raise tariffs on steel by 25 percent and on aluminum by 10 percent for national security reasons. This raised concerns about possible retaliation by US trading partners that might lead to a damaging cycle of trade actions that shrank world trade and spurred a global depression. US national security economic-related worries pertain not only to trade but also to foreign direct investment (FDI), especially high-tech FDI, because an increasing number of civilian technologies can be adapted for military use.
