An eleventh-hour deal achieved President Trump’s political aims, but Wall Street remains concerned that tariffs will become a permanent threat in negotiations.

Worries about President Trump’s tariffs are hurting U.S. stocks as financial markets worldwide drop on concerns about a potential trade war.

Reactions across Wall Street are trickling in, and it would appear economists and strategists agree on Trump's pain shout-out. So do markets: As of this writing on Monday, Dow Jones Industrial Average futures were down more than 500 points.