MARKETS LIVE: Nasdaq extends record run as AI trade offsets Dow weakness

US stocks finished mixed on Tuesday, with the Nasdaq extending its record-setting run as strength in AI-related shares helped offset weakness in the Dow. The Nasdaq rose 0.5% to 27,244, marking a second straight record close, while the S&P 500 was essentially flat at 7,765. The Dow Jones Industrial Average fell 185 points, or 0.4%, to 51,864. Investors continued to adjust portfolios with the third quarter drawing to a close, while a relatively light economic calendar kept the focus on individual stocks and broader market themes. Falling oil prices also helped ease some inflation concerns, while the AI trade remained a key source of momentum for technology stocks. Attention now turns to Micron Technology, which is due to report quarterly results after the closing bell on Wednesday. The chipmaker's results and outlook are expected to offer another read on demand for AI-related hardware and spending across the sector. 374Water Inc (NASDAQ:SCWO, FRA:8LL) will present new data on the destruction efficiency of its AirSCWO supercritical water oxidation technology for treating PFAS, 6PPD-Q and other emerging contaminants at WEFTEC 2026 in New Orleans. Graphene Manufacturing Group Ltd (TSX-V:GMG, OTCQX:GMGMF) has agreed to raise approximately US$10 million through a private placement of nearly…