The stock exchanges in New York mainly started the new session with losses on Friday, after an erratic trading day on Thursday.
There are concerns on Wall Street about the increasing number of corona infections in Europe and the United States. The lack of political agreement on a new American aid package weighs extra on that gloom.
The Dow Jones index fell 0.3 percent to 26,768 points in the first trading minutes. The S&P 500 fell 0.2 percent to 3,241 points. Tech gauge Nasdaq lost a fraction to 10,665 points.
The further spread of the coronavirus has already led to a reintroduction of various lockdown measures in European countries. In the United States, too, the number of positive people in parts of the country is rising sharply, causing fears of a new wave of contamination.
Meanwhile, the US government has still not been able to offer markets new support to boost the economy.
In recent days, discomfort has also surfaced over the upcoming presidential election. The risk of more significant divisions from the electoral struggle is creating additional uncertainty for investors after President Donald Trump hinted that he would not accept the outcome without a fight.
The companies paid attention to Apple (plus 0.5 percent). The European Commission will try to penalize Ireland and Apple for tax deals that are very beneficial for the tech giant. EU Commissioner Margrethe Vestager insists that this is prohibited state aid and, after the defeat at a lower European court, is now going to the European Court of Justice.
Boeing rose 1.2 percent on the news around its troubled MAX 737 aircraft. European regulators expect to be ready in November with an evaluation of the aircraft type, which has been grounded worldwide for more than a year due to two plane crashes.