Nippon Steel is racing to finalize its deal to purchase U.S. Steel before President-elect Donald Trump takes office. But the Biden administration just threw a wrench in that plan, imposing higher tariffs on the Japanese company, despite Nippon’s promise not to import foreign-made steel into the U.S. Also: we discuss market reactions to rising tensions in Ukraine and speak with Rosina Samadani, CEO of Oculogica, a medical device company that has developed a new method of diagnosing concussions.