The Dow Jones Industrial Average fell nearly 400 points Thursday as steep falls in Chinese equities spilled over to global markets

Thursday’s selloff came after the People’s Bank of China made its largest downward adjustment to the yuan since August. The country’s stock market fell more than 7% amid concerns about capital flight from the Asian giant, and China’s stock markets stopped trading after only 30 minutes, ending the shortest trading day in their history after the newly installed mechanism to limit volatility was triggered...