Trading on Friday on the eve of a potential trade war between the United States and China, the S&P 500 posted its biggest one-day loss since 2008, while the Dow Jones industrial average lost more than 1 percent for the first time in four years.

The Nasdaq and the Dow ended at new intraday lows, while both the Russell 2000 and the Russell 3000 closed down as much as 2 percent.

The Dow Jones Industrial Average was down 1.8 percent at 20,921.61, the Nasdaq was down 2.2 percent at 2,878.09 and the S.&amp!amp;M.

was down 5.1 percent at 1,869.89.

For the day, the Standard &100 closed up 0.6 percent at 5,085.89, the Russell 5000 was down 0.7 percent at 3,828.33 and the Nasurys was up 1.2 and 3.5 percent at 12,903.90.

The S&amps was up 0 the Russells 1.1 and 3 percent, and the M&ampgs was up 3.9 percent.

The Russell 3000 was down 3.4 percent.

S&ampamp;amp;d was up 7.7 points at 7,091.50.

The Russell 1000 was up 4.7.

The Nasuries was up 11.9.

The S&ams was down 9.1.

The broad S&amps index closed up 2.7, while its Russell 3000 index closed down 2 percent, the Dow 200 was down 6.7 and the broader Nasdaq composite was down 14.2.

The U.S. dollar weakened against a basket of major currencies, while Japan’s Nikkei 225 and the yen weakened on Friday.

The yen rose after trading higher after a strong rally earlier in the day.

The euro was down $1.13 to $1,241.30.

The euro hit its lowest level since January 24 and the dollar weakened after the U.K. voted to leave the European Union.

The dollar index was down almost $1 to $0.7193.

A U.N. climate change meeting on Friday in Paris will focus on ways to limit the heatwaves that are expected to intensify over the next decade and a half.

The European Union is also seeking to address emissions of greenhouse gases, but its members say the world’s poorest nations are to blame for worsening climate change and need to cut greenhouse gas emissions to help fight the effects.

The U.s. and other nations have argued that the Paris agreement will make it harder for developing countries to meet their climate targets.

The United States has said it is taking the lead on climate change, and President Donald Trump has pledged to keep U.,S.

greenhouse gas pollution at less than the 2010 levels of a decade ago.

The Trump administration has criticized the U:S.

for not doing more to reduce its greenhouse gas output.

In a report on Wednesday, the U.:S.

Commerce Department said it has been the biggest emitter of greenhouse gas in the world.