"Big Bank Earnings: US Stock Futures Mainly Lower"

US stock futures traded lower ahead of major bank earnings, with a focus on interest rate impact. Big banks like JPMorgan Chase, Citigroup, and Wells Fargo are set to report, and analysts expect a 5% increase in S&P 500 company earnings for the first quarter. Fed speakers and geopolitical risks in the Middle East are also in focus, with crude prices rising due to elevated risks but set for weekly losses on concerns over US monetary policy.