All three major averages slipped on Monday as tensions in the Middle East threatened the staying power of a tenuous ceasefire between the U.S. and Iran.

May 4 (Reuters) - U.S. stock index futures were mixed on Monday, pointing to a cautious start to the week as investors assessed the growing U.S.-Iran standoff over the Strait of Hormuz, the crucial oil shipping route that remains shut.

Investor anxiety surged as US stock futures fluctuated amid reports of a US warship incident near the Strait of Hormuz. While concerns over oil supply disruptions grow, April's robust corporate earnings helped maintain market momentum despite geopolitical risks.

WTI oil above $100 rattles US stocks as Dow slips and S&P500 turns cautious. Traders watch Iran headlines and jobs forecast for market direction.

U.S. stock futures traded at record-high levels on Monday as investors eyed impressive earnings even as the Strait of Hormuz keeps oil prices high. Dow Jones Industrial Average futures fell 0.08%, to 49606.

The Dow and S&P 500 are lower this morning amid mixed reports of a blocked U.S. warship in the Strait of Hormuz

U.S. stock futures declined Monday after Iran claimed missile strikes on a warship. The Pentagon denied the reports. Oil prices surged on supply concerns.

Dow Jones Futures: Iran attacks sparked stock market losses Monday. Palantir stock dropped on earnings late.