Most of the US stocks fell during today's trading as Nasdaq and Standard & Poor's slipped, while Dow Jones settled flat, erasing earlier gains.
This comes as the global markets focus shifted towards the G20 summit, which will be launched next Friday and will see important meetings, most notably a meeting between US President Donald Trump and his Chinese counterpart, Xi Jinping.
President Trump renewed his criticism of the US Federal Reserve, blaming it for losing more US economic development as a result of the tightening monetary policy.
On the other hand, President Trump signed an executive order imposing financial sanctions against Iranian officials.
In the oil market, West Texas rose 0.8% to close at $57.90 per barrel, with the highest at $58.2 and the lowest at $56.7.
Brent fell 0.5% to $64.86 per barrel, with the highest at $65.7 and the lowest at $64.08.
Dow Jones rose eight points to close at 26,727 points, with the highest level of today at 26,807 points and the lowest at 26,723 points.
Nasdaq slipped 0.3% (equivalent to 26 points) to 8,005 points, and recorded a high of 8,047 points and a low of 8,004 points.
Standard & Poor's fell 0.2% (5 points) to 2,945 points, with the highest level at 2,954 points and the lowest level at 2,944 points.