US stocks: US stocks open lower as oil gains on Mideast uncertainty, eyes on Trump-Xi talks

Wall Street's main stock indexes fell as Middle East tensions weighed on financial markets. Oil prices have risen, which is causing a spike in Treasury yields during this period. The Dow Jones Industrial Average, S&P 500, and Nasdaq Composite all opened lower this morning. Investors are also showing caution ahead of a significant summit between Donald Trump and Xi Jinping.