Stock Market 6 December 2025

Teradyne shares rose 7.19% on Thursday to $437.92 and gained 8.6% for the week, with the stock set to join the Nasdaq-100 before Monday’s open, driven by strong AI-related test demand. Sandisk closed at $2,184.75 after an 11.54% gain, contributing to a 2.43% weekly rise in the Nasdaq and a 7% gain in the Philadelphia semiconductor index, with attention turning to Micron’s upcoming earnings. Astera Labs jumped 11.31% to $417.07 and climbed 13.6% for the week, also set to join the Nasdaq-100, supported by AI infrastructure demand. Nebius closed at $286.69, up 2.06%, and will be added to the Nasdaq-100 alongside CoreWeave. Vertiv shares ended at $333.05, up 4.87% Thursday and nearly 10% for the week, with AI data-center cooling as a key driver. Redwire fell 5.1% to $14.35 for the week as investors weigh backlog growth against a new $500 million share program that could dilute shares. Netflix slipped 3.7% to $77.38 for the week. Plug Power rose 7.55% Thursday to $2.85, ending the week up 3.3%. Aditxt soared 127.27% to $0.0100 on Thursday with over 5.38 billion shares traded, as SEC filings showed significant share sales by HRT Financial LP and DRW Securities. PG&E faced outages affecting over 9,000 customers in Northern California due to storms and dry lightning. PayPal gained 1.02% Thursday to $42.51, up 2.4% for the week. Keel’s shares rose 12.33% on the TSX and 5.36% on Nasdaq. Merrill Lynch was fined $175,000 by FINRA for municipal-bond disclosure issues, following a $225,000 censure for unreported call-center complaints, as Bank of America expands in Baton Rouge. SpaceX ETFs saw over $10 billion in first-week trading volume, with ARK Innovation ETF drawing a record $4.6 billion inflow. Pennsylvania’s average gasoline price was $4.109 per gallon, down 53.5 cents from a month ago but still above national and year-ago averages. JBS USA is closing beef and meat-processing plants in Pennsylvania and Memphis, affecting 1,693 jobs, as cattle supply remains tight and beef prices high. TSMC’s U.S. shares surged 6.9% to $462.12 and Nvidia rose 3% to $210.69, with TSMC up 9% and Nvidia up 2.7% for the week, while the PHLX Semiconductor Index gained 7.3%. Intel hit a new high of $133.99, up 10.6%, and AMD rose 4.9% to $537.37, with both outperforming the broader Nasdaq.