S&P 500 futures gained 0.2%, Nasdaq-100 futures climbed 0.4%, and Dow Jones Industrial Average futures added 0.2%. According to the CME FedWatch tool, traders assign a 92.5% probability to a quarter-point hike at Wednesday's 2 p.m. ET decision. The 10-year Treasury yield hovered near 5%, while the 30-year yield stood at 5.374%.