President Donald Trump said that Chinese leader Xi Jinping has committed to purchasing 200 jets from American manufacturer Boeing, but the news didn't please investors. 

The company's investors have been waiting for substantial new orders from China for months, but they were expecting more than the 200 Trump mentioned, The Wall Street Journal reported. Last year, Beijing and Washington were discussing a deal for orders of hundreds of jets, possibly as many as 500. 

Shares of Boeing were down nearly 4% on Thursday following Trump's statements made during a Fox News interview, and the decline puts the company on track to be the Dow's worst performer in the Dow.