U.S. stock markets are experiencing a cautious midday trading session on Tuesday, September 30, 2025, as investors grapple with the looming threat of a potential government shutdown and await crucial economic data later in the week. While major indexes are largely in the red, technology stocks continue to show resilience, driven by ongoing optimism in the artificial intelligence (AI) sector. Despite today's dip, the broader market remains on track to conclude September with a fifth consecutive month of gain ...