But one billionaire investor and former Trump adviser, Carl Icahn, was seemingly unvexed, having dumped a million shares tied to the steel industry a week before the president announced 25 percent tariffs for foreign-made steel.

A Feb. 22 SEC filing shows Icahn sold off his $31.3 million stake in the Manitowoc Company, which is a leading global manufacturer of cranes for heavy construction based in Manitowoc, Wis., according to the company’s website. Since Trump’s announcement Thursday, Manitowoc’s stock has plummeted to about $26. Icahn — who has had majority interest in several companies including Motorola, Xerox, Family Dollar and Pep Boys — had sold his shares for about $32 to $34 each, according to the filing.

Icahn had not actively traded any Manitowoc stock since January 2015, according to regulatory filings.