U.S. stocks finished mixed Thursday, with the Dow Jones Industrial Average down 0.31% to 51,349.98, the S&P 500 down 0.02% to 7,703.13 and the Nasdaq Composite up 0.01% to 26,939.37. The VIX volatility index rose 3.23% as AI-related shares broadly declined, led by Arm's 7.88% drop, while Apimeds surged 114.85%, Meta gained 4.5%, Everpure rose 11.15%, and Akamai fell 6.78% in regular trading before jumping 20.65% after hours. Apimeds' subsidiary MindWave Innovations agreed to develop AQUAEChain, Akamai expanded its Anthropic commitments to $11.6 billion over seven years, Costco reported record fiscal fourth-quarter revenue, and MSX.COM said it had listed hundreds of tokens linked to stocks and exchange-traded funds.