Nippon Steel plans to invest $14 billion in U.S. Steel's operations including up to $4 billion in a new steel mill if the Trump administration green lights its bid for the iconic U.S. company, according to a document and three people familiar with the matter.

US Steel (NYSE:X) shares gyrate before edging higher Monday, +0.6%, after Reuters reported Nippon Steel (OTCPK:NPSCY) (OTCPK:NISTF) plans to spend $14B on US Steel's operations including up to $4B in a new steel mill if the Trump administration approves the Japanese company's takeover bid,