All US financial markets are closed today in order to observe Presidents Day holiday

USA (Feb 17)  Washington's Birthday is a United States federal holiday celebrated on the third Monday of February in honor of George Washington, the first President of the United States, who was born on February 22, 1732. Since the Uniform Federal Holidays Act of 1971, its observance can occur from February 15 to 21, inclusive.

Colloquially, the day is also now widely known as Presidents' Day and is often an occasion to honor the incumbent president and all who have served as president, not just George Washington.

US financial markets will reopen at normal hours on Tuesday, February 18, 2020.

Wikipedia