Wall Street is shut for the weekend, but AI stocks are not taking a break in the headlines. With the S&P 500 hovering near record territory after a quiet, low-volume post-Christmas session, investors are heading into the final trading days of 2025 weighing two powerful—and conflicting—narratives: the continued buildout of AI infrastructure that keeps lifting chip and cloud leaders, and a growing drumbeat of skepticism about valuation, deal structures, and how the AI boom is being financed. Reuters+2Reuters+2