U.S. stocks plunged Thursday as investors feared the ramifications of the coronavirus pandemic, even as Congress hustled to pass emergency economic legislation and the Federal Reserve intervened to ensure a functioning market.

The Fed announced it would inject more than $1 trillion into the banking system to help shore up reserves so short-term funding markets would work smoother at a time when the coronavirus is wreaking havoc on all markets.

“These changes are being made to address highly unusual disruptions in Treasury financing markets associated with the coronavirus outbreak,” the Fed stated in the announcement on funding changes.

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Action by the Fed temporarily lifted all U.S. indexes in mid-afternoon trading, but losses returned later in day trading.

The Dow Jones Industrial Average closed 10.02% lower, losing over 2,300 points. The same can be said for the S&P 500 and Nasdaq composite, closing down 9.50% and 9.43%, respectively.

The virus has shuttered Broadway theaters indefinitely Thursday as New York City banned gatherings of 500 people or more.

New York Gov. Andrew Cuomo said Thursday that his state will likely see the same spread of the coronavirus as has been seen in China, South Korea, and Italy, where the virus has inflicted millions of people.

The National Hockey League suspended its season until further notice Thursday.

In other sporting news, Major League Baseball has delayed opening day for at least two weeks, and PGA Tour Commissioner Jay Monahan announced Thursday that fans will not be allowed at its golf tournaments. And the Senate canceled its recess next week to work on emergency legislation.

Goldman Sachs announced Thursday that starting Monday, it will reduce the number of people who work in their U.S. offices, and other locations. It will divide its employees into two groups and alternate each week the group that works in the office and the one that works remotely. This plan will stay in effect until further notice, according to a firm spokesperson.