NEW YORK Stocks fell sharply as investors worried that President Donald Trump's planned tariffs on steel and aluminum will lead to retaliation from other countries.
Trump told industry executives Thursday he would impose the tariffs next week. The head of the European Commission said the region would respond in kind.
Industrial companies like Boeing and Caterpillar that use steel and aluminum fell sharply, as did exporters like Apple whose overseas sales could be hurt by a trade war. Steel makers rose.
The Standard & Poor's 500 index dropped 36 points, or 1.3 percent, to 2,677.
The Dow Jones industrial average fell 420 points, or 1.7 percent, to 24,608. The Nasdaq fell 92 points, or 1.3 percent, to 7,180.
Stocks turned sharply lower in afternoon trading as talk of steep tariffs and a trade war on steel and aluminum spooked investors.
The Dow Jones industrial average dropped as much as 500 points in afternoon trading.