After a few minutes of trading, the broad S&P 500 index is unchanged, the technology-heavy Nasdaq composite index is up 0.2 and the Dow Jones industrial index has fallen 0.2 percent.
The development comes after all three indices performed good rises on Friday when the S&P 500 closed above 6,000 points for the first time since the end of February and is now about 3 percent from its highest closing price so far.
Tesla's stock has fallen 3.6 percent after the weekend's row on social media between Tesla founder Elon Musk and US President Donald Trump. According to news agency Bloomberg, several analysis houses have also lowered their recommendations for the stock after the weekend's verbal sparring.
Several events will occur this week with potential major market impact. In London, the second round of trade talks between China and the US began on Monday.
Later in the week, the US consumer and producer price indices will also be reported, which will provide clues about the inflation rate.
Additionally, a survey on consumer confidence will be conducted, reports CNBC.
