What Is A Tariff And What Does It Do? By: Benzinga via Benzinga March 04, 2018 at 11:03 AM EST U.S. stocks tumbled last week after President Trump said Thursday he plans on implementing a 25 percent tariff on steel imports. The ... Read More >> Related Stocks: Dow Industrials SPDR SPDR S&P 500 ETF Trust United States Steel Corp