Trading in U.S. stock futures and other key markets resumed after a lengthy outage caused by a cooling issue at a data center operated by CME Group. The disruption halted trading for around 10 hours, affecting various futures markets and causing confusion across global financial landscapes. As traders looked to wrap up a rocky month, major indexes like the Dow, S&P 500, and Nasdaq opened muted, though some stocks, including tech giants like Google and Nvidia, started to rally premarket. The markets showed signs of recovery as futures ticked higher following the restoration of trading operations. With the month coming to a close and last trading day approaching, U.S. stocks are beginning to rise, signaling potential positive movement as investors react to the resumption of trading.