U.S. stock futures have dipped significantly as tensions rise in the Middle East following attacks between Iran and Israel, leading to a considerable fall in global stock markets. The Kospi in South Korea plunged 8%, and major U.S. indices saw sharp declines, with the Nasdaq experiencing its worst day in over a year. Oil prices have surged by more than $2 due to the ongoing conflict, climbing back toward $100 a barrel as concerns over supply disruptions mount. Analysts suggest that market optimism regarding U.S.-Iran diplomatic talks has diminished, contributing to the volatile oil market. The S&P 500 halted its record-breaking winning streak as bond yields and oil prices increased amidst this geopolitical turmoil.