Tesla has had a tumultuous few days of trading—and now its stock looks set to end its four-week winning streak. Tesla stock has fallen 1.4% to $336.44 in early trading, while the S&P 500 and Dow Jones Industrial Average were down 1% and 0.

U.S. stocks are falling after President Donald Trump threatened 50% tariffs on the European Union that could begin in a little more than a week.

Stock markets declined after the president’s early-morning threats of 25 percent import taxes on iPhones and 50 percent on goods from Europe.