U.S. stock futures were mostly higher in early European trading as markets turned to the release of U.S. Federal Reserve minutes on Wednesday for clues on the committee’s thinking about interest rates. Attention this week is also on U.S. consumer sentiment and corporate results from Walmart and Home Depot. Geopolitical risk remains in focus as the 60-day memorandum of understanding between the U.S. and Iran expires on Monday with negotiations still at a standstill. Swissquote’s Ipek Ozkardeskaya said the U.S. is preparing fresh sanctions to pressure Iran back to talks, while Iran showed a more offensive stance last week, signaling that peace may not be near.