The Washington Post reports that US President Biden will prevent Japan’s Nippon Steel from acquiring US Steel, citing national security grounds. There will probably be a legal challenge to this, as national security might be hard to justify. Economic nationalism, however, is not just about trade in goods—it also often covers capital flows. Interestingly, economic nationalism goes both ways on capital flows: “how dare foreigners buy our assets?” for inflows; and “why are you not investing at home?” for outflows.