Detroit 3 get Wall Street boost as U.S., Mexico deal averts tariff doomsday Detroit 3 get Wall Street boost as U.S., Mexico deal averts tariff doomsday August 28, 2018 dzadmin Comments 0 Comment Judging from the jump in GM and Ford shares, the market thinks President Trump’s accord with Mexico to replace NAFTA will enable U.S. automakers to carry on business as usual.