U.S. stock index futures slid sharply on Wednesday, with Nasdaq futures touching a four-week low after President Donald Trump said a memorandum of understanding aimed at ending the war with Iran was "over", sending oil prices rising.
Speaking in Ankara ahead of a NATO summit in the Turkish capital, the U.S. president said he had no interest in engaging further with Iran, deepening investor concerns over renewed escalation in the Middle East and marking the latest blow to the fragile ceasefire between Washington and Tehran.
