Stock Market Today, June 26: Sandisk Tumbles and Tech Weakness Weighs on Markets

Major stock indices declined on June 26, 2026, as technology weakness intensified following sticky inflation data. Sandisk plunged over 10% and Micron Technology fell 7% as memory and chipmakers faced a broad sell-off. The Nasdaq finished the week down 5% amid concerns about AI valuations, though some analysts note strong fundamentals remain despite high capital expenditures.