Despite Moody's downgrade on the U.S. credit rating, stocks overcame pressure and closed mostly higher. Nvidia (NVDA) barely crossed over the flat line despite highlighting a slew of new developments to enrich its ties to the A.I. space. Walmart (WMT) was the target of a Truth Social post after President Trump told the company to "eat the tariffs." UnitedHealth (UNH) rallied even with new bearish sentiment hitting the stock. Alex Coffey turns to the session's biggest stories.