S&P 500 Gains and Losses Today: Palantir Stock Jumps as NATO Enlists AI Military System

1. Palantir shares surged 4.6% after NATO acquired its AI military system. 2. NATO's quick procurement emphasizes the efficiency of PLTR's solutions. 3. Overall market sentiment improved with major indices gaining around 0.8%. 4. DaVita faced a ransomware attack, affecting healthcare stocks negatively. 5. Electronics tariff exemptions boosted U.S. equity markets, aiding broader market confidence.