Alcoa (NYSE:AA) -2.5% in Tuesday's trading, potentially headed for its lowest YTD closing price, after saying President Trump's plan to impose a 25% tariff on aluminum imports could knock out ~100K U.

(Reuters) -Aluminum producer Alcoa said on Tuesday that U.S. President Donald Trump's plan to impose a tariff on aluminum imports could cost about 100,000 U.S. jobs and would itself not be enough to entice it to boost production in the country.

A 25% tariff would cost the U.S. aluminum industry tens of thousands of direct and indirect jobs, Bill Oplinger told an investment bank conference.