Wall Street stocks fell early Monday as unrest in Hong Kong added to lingering anxiety over weakening growth and the grinding US-China trade war.
Authorities said more than 5,000 people descended on the Hong Kong airport on Monday carrying placards and chanting slogans about police violence, shutting the normally-busy hub.
The demonstration came on the heels of last week's escalations in the US-China trade fight that many economists see as a factor in a slowdown in leading economies.
About 15 minutes into trading, the Dow Jones Industrial Average lost 0.8 percent to 26,083.00, and the broad-based S&P 500 dropped a similar amount to 2,895.18.
The tech-rich Nasdaq Composite Index fell 0.9 percent to 7,890.31.
Key economic releases this week include retail sales and consumer price readings for July, as well as housing starts for the same period.
The earnings calendar includes a spate of reports from leading retailers, including Walmart and Macy's that are expected to offer a window into the on-the-ground effects of the trade war on American consumers.