A global ratings agency has estimated that the recent partial government shutdown cost the U.S. economy at least $6 billion, according to a Reuters report.

Standard & Poor’s Global Ratings announced on Friday that its estimation is based on productivity loss from furloughed workers and economic activity loss to outside business, according to the news agency.

“Although this shutdown has ended, little agreement on Capitol Hill will likely weigh on business confidence and financial market sentiments,” the company said in a statement.

I wish people would read or listen to my words on the Border Wall. This was in no way a concession. It was taking care of millions of people who were getting badly hurt by the Shutdown with the understanding that in 21 days, if no deal is done, it’s off to the races! — Donald J. Trump (@realDonaldTrump) January 26, 2019

Two competing proposals to reopen the government failed to pass in the Senate earlier this week, prior to Trump’s announcement.

The president backed down after a weekslong stand off with congressional Democrats, who refused to approve $5.7 billion in taxpayer money to build a wall on the U.S.-Mexico border. Trump had previously promised Mexico would pay for the wall during his campaign.

Trump agreed to reopen the government for three weeks, until Feb. 15, so that hundreds of thousands of federal workers who have gone without pay, or have been furloughed, could get paid as border security negotiations continue.

The president also promised on Friday that federal workers would receive back pay “as soon as possible.”

During that same speech, Trump vowed to shut down the government again if he doesn’t get a “fair deal from Congress.”

On Saturday, the president tweeted that “negotiations with Democrats will start immediately.”