US stock futures slid as markets reacted to increasing oil prices and cautious sentiment ahead of major technology earnings reports from companies like Alphabet and Tesla. The S&P 500 and Nasdaq closed lower, reflecting investor unease as geopolitical tensions in the Middle East persisted and inflation fears resurfaced. Despite a strong performance from some sectors, overall trading was mixed, with health care offsets taking the edge off losses in bank stocks. Traders remained focused on developments in corporate earnings while closely monitoring the oil market, which saw prices rise significantly amid ongoing conflicts.