The Dow Jones Industrial Average plunged 850 points on Monday, while the S&P 500 fell 3.3%. The Nasdaq Composite dropped as well, falling 3.9%.

This comes in response to growing tensions in the trade war between China and the U.S. China, which has historically controlled its currency, the yuan, allowed it to fall to its lowest level against the dollar in over 10 years, CNBC reports. In response, President Donald Trump accused China of manipulating its currency. "This is a major violation which will greatly weaken China over time!" he said in a Tweet.