Stocks try for back-to-back gains -- plus, Qnity gets iPhone business from Apple

Stocks tried to build momentum for a second straight day Tuesday as the S&P 500 and Nasdaq looked poised for back-to-back gains. Earnings across major companies were generally solid, with many beating estimates and raising full-year guidance, though reactions were mixed amid moving oil prices and interest rates. Crude rose early on before slipping on hopes for progress on a Middle East peace deal, while the 10-year Treasury yield edged up later fell after weak economic data. Semiconductor names swung: CoreWeave initially dropped on concerns about rising cost of capital, then reversed upward. Apple expanded its partnership with Qnity Electronics through its American Manufacturing Program for iPhone 18 Pro variable aperture camera films. Capital One reported after the close, with other earnings from SpaceX, Netflix, United Airlines, Chubb and Intuitive Surgical.