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Stock Market 9 February 2026
CoreWeave closed the week at $117.95, up 17.3% ahead of its addition to the Nasdaq-100, joining Astera Labs, Nebius, Rocket Lab, and Teradyne. Coherent shares rose 2.8% Thursday and 1.2% for the week after announcing a letter of intent to receive up to $50 million from the U.S. CHIPS Act. Applied Optoelectronics fell 3.3% Thursday and 4.3% for the week. Micron ended Thursday at $1,133.99, up 8.7% for the day and 15.5% for the week, with upcoming earnings expected to test the AI memory rally. Amkor Technology rose 4.7% after TSMC signed a 10-year deal for advanced packaging and testing in Arizona. Rocket Lab ended at $107.24, down 0.69% Thursday but up 4.7% for the week after an analyst upgrade and index news. Marvell rose 7.27% to $310.58 and is set to enter the S&P 500. IonQ gained 3.4% Thursday but finished the week down 2.2%. Teradyne rose 7.19% Thursday and 8.6% for the week, set to join the Nasdaq-100. Sandisk closed at $2,184.75, up 11.54% Thursday, with the semiconductor index up 7% for the week. Astera Labs jumped 11.31% Thursday and 13.6% for the week, also joining the Nasdaq-100. Nebius rose 2.06% and will be added to the Nasdaq-100. Vertiv climbed 4.87% Thursday and nearly 10% for the week, driven by AI data-center cooling demand. Redwire fell 5.1% as investors weighed backlog growth against a $500 million share program. Netflix slipped 3.7% for the week. Plug Power rose 7.55% Thursday and 3.3% for the week. Aditxt jumped 127.27% to $0.0100, with high volume and insider sales reported. The S&P 500 rose 0.93%, Nasdaq 2.43%, and Dow 0.71% for the week, with semiconductor stocks rebounding, led by Intel’s 10.6% gain after news of a partnership with Apple.