U.S. stocks concluded the trading session on a positive note, with the Dow Jones Industrial Average rising significantly by over 300 points, chiefly driven by gains in UnitedHealth shares. The health care sector has shown resilience, helping the Dow outperform against the S&P 500 and Nasdaq. Despite some fluctuations in solar stocks, the overall market displayed recovery with interest in biotech and health care stocks leading the charge. Market breadth remains weak, but the notable uptick in UnitedHealth and other key players like 3M and Nike has provided a much-needed boost, showcasing a potential shift in market dynamics.