The major domestic equity indexes ended the shortened trading on Friday in negative territory as the energy sector fell on continued weakness in oil prices, and the benchmark S&P 500 confirmed its second correction of 2018. The S&P 500 ended about 10.2 percent down from its Sept. 20 closing record high.

Oil prices slipped to their lowest in more than a year, dragging down energy shares, while investors were nervous ahead of U.S.-China trade talks at the G20 summit next week.

Volumes were thin in a shortened trading session on Friday, with the stock market closing at 1 p.m. The market was closed on Thursday for the Thanksgiving holiday.

Benchmark Brent crude fell more than 4 percent even as oil producers considered cutting production to stem a rising global surplus.

Oil majors Exxon Mobil and Chevron fell almost 3 percent each and were the top losers on the Dow Jones Industrial Average. Oilfield services providers Schlumberger and Halliburton fell nearly 4 percent. Marathon Oil shed 4.63 percent.

That pressured the S&P energy index, which fell 3.3 percent, the most among 11 major S&P sectors, which were either trading flat or in the red.

The Nasdaq, which has lost 3.8 percent so far this week, is on pace for its largest weekly decline since late March as worries about a cooling global economy and peaking corporate earnings have led investors to sell high-growth names, particularly in the technology sector.

Aside from energy, declines in Apple and Amazon weighed on the S&P 500, underscoring declines in the shares of  technology and internet companies that has marked this latest swoon in equities.

The focus in the upcoming week will be on the G20 summit in Buenos Aires, where Trump and his Chinese counterpart Xi Jinping are expected to hold talks amid a worsening trade dispute between the two countries that has weighed on financial markets and sparked fears of a global slowdown.

The high-stakes meeting comes as the Trump administration shows little sign of backing down in its demands and rhetoric. Chinese Vice Commerce Minister Wang Shouwen said on Friday that trade talks should be equal and mutually beneficial.

Adding to worries, the Wall Street Journal reported that the government was trying to persuade wireless and internet providers in allied countries to avoid telecommunications equipment from China’s Huawei Technologies.

Retail stocks will be in focus as shoppers hit department stores for Black Friday deals, with a strong economy and rising wages driving a solid start to the holiday selling season.

Amazon lost about a percent, while Walmart edged nearly one percent. United Technologies rose 3.33 percent after receiving conditional approval from China’s market regulator to acquire Rockwell Collins. Rockwell shares were up 9.1 percent.

Approximately 3.4 billion shares changed hands on the major domestic equity exchanges, a number that was well below the 8.2 billion share average over the past 20 trading days.