Automaker stocks dive after Trump announces new tariffs on steel and aluminum imports By: CNBC.com News March 01, 2018 at 14:47 PM EST General Motors shares fell about 4.6 percent, while Fiat Chrysler declined 3.7 percent and Ford shares fell 3.5 percent. Read More >> Related Stocks: Ford Motor General Motors Honda Motor Company ADR Toyota Motor Corp Ltd Ord ADR