Heavyweight tech stocks carried US equity indices on an otherwise negative session on Tuesday on mostly a positive earnings prospective in the sector. The S&P 500 rose 0.5% to set a fresh record and the Nasdaq 100 jumped 1%. Microsoft and Apple gained over 2% ahead of their earnings this week, while Micron and Broadcom advanced between 6% and 4% to extend the positive momentum for chip producers. In turn, General Motors jumped more than 5% after raising its 2026 guidance, while UPS added 2% following an earnings and revenue beat. In contrast, the Dow Jones fell about 500 points, dragged lower by a 20% plunge in UnitedHealth shares after the company warned of its first annual revenue decline in three decades. The healthcare sector was already under pressure, with CVS Health sliding 9.7% and Humana dropping 18.8% after the US proposed holding payments to private Medicare plans flat next year. Boeing also weighed on the index, falling 1.2% after its results failed to impress investors.