U.S. stock futures edged lower early Monday after the United States and Iran resumed military attacks, disrupting oil shipments through the Strait of Hormuz and pushing Brent crude up 2%. The geopolitical shock comes as investors adopt a more hawkish view of Federal Reserve policy following Chair Kevin Warsh's first appearance at the Fed's Jackson Hole symposium. Traders see nearly a 60% chance of a September rate hike, up from 41.4% a week earlier, according to the CME FedWatch tool. Warsh said policymakers may need to raise rates if inflation does not ease toward the Fed's 2% target, while recent data have offered mixed signals. The August U.S. employment report, due September 4, is the week's main market focus. Nvidia and several chipmakers rose before the bell, while energy and most crypto-related stocks also gained; bitcoin remained above $78,000.