U.S. stock futures pointed to a cautious start on Monday, as fresh geopolitical worries resurfaced after President Donald Trump tweeted a strong warning to Iran.
Meanwhile, technology stocks were looking particularly weak, given Tesla Motor Co.'s premarket losses after a report the electric-car maker asked suppliers for refunds. That's as investors waited for another round of earnings to come this week, with Google-parent Alphabet due to report later.
Dow Jones Industrial Average futures eased 16 points to 25,014, while S&P 500 futures slipped 2.3 points to 2,798.50. Nasdaq-100 futures fell 23.75 points, or 0.3%, to 7,336.50.
Investors could be facing a fresh worry on the geopolitical front after Trump lashed out at Iranian President Hassan Rouhani in an all-caps tweet on Sunday evening, warning him not to threaten the U.S. That came hours after Rouhani cautioned Trump against pursuing a hostile policy towards his country.