September marks the end of the summer slump on Wall Street, and could also be the most crucial month of the year. Congress' failure to pass a funding bill that keeps the government open is just one many risks that could rock global markets. Historically, stocks have rebounded after government shutdowns, and investors still flocked to Treasurys. But this administration imperils the market's calm in a unique way.

Source:  Business Insider, 03/09/2017