Investing.com - Futures linked to the main U.S. stock indices rise, suggesting an extension to tech-driven gains in the previous session. Analysts assess hawkish overtones in minutes from the Federal Reserve’s January meeting, while oil climbs as military activity in the Middle East exacerbates worries over potential supply disruptions. Walmart and Deere are due to report quarterly results, providing possible insight into the state of key portions of the American economy.