Wall Street added to a recent losing streak on Wednesday, as global markets remained pessimistic about the trade negotiations this week between the United States and China.

The S&P 500 closed down 0.2 percent, after a 1.7 percent drop on Tuesday. The 2.3 percent decline this week for the broad index puts it on track for its worst weekly performance this year.

The selling has been driven by a sudden shift in tone surrounding the trade talks between the world’s two largest economies, and on Wednesday, President Trump continued to be combative on the topic and taunted the Chinese government on Twitter.

He also took to Twitter on Wednesday to say that “China has just informed us” that officials “are now coming to the U.S. to make a deal,” though the statement did little to bolster investor sentiment.