US stocks today: Wall Street trades in red as oil tops $100 per barrel; Nasdaq tumbles over 2%, Dow slips over 600 points

Major stock markets opened lower as Big Tech's AI spending raised investor concerns. Alphabet and Tesla shares fell significantly after their latest quarterly earnings reports. Oil prices surged past one hundred dollars per barrel amid Middle East tensions. This geopolitical situation also increased expectations for a potential Federal Reserve interest rate hike. Weak market breadth indicated more declining stocks than advancing ones across exchanges.