Nvidia broke through to a new record high this week even as a broad bond sell-off dragged other sectors lower. Demand for AI accelerators continues to outrun supply, and the companies buying them are financing an unprecedented build-out of data centres.
A record close against a falling market
Investors treated the chip designer as a haven inside a technology sector that is otherwise sensitive to rising yields. Orders for high-bandwidth memory, advanced packaging and networking gear remain booked far into next year, and analysts said the constraint is production capacity rather than demand. The sector in the cross hairs of the bond sell-off looked poised for a bounce once yields stabilise.
Warning signs from the central bank
Bank of England governor Andrew Bailey said the central bank is watching the waves of cash going into AI "very carefully" and warned the boom could trigger market shocks. Large technology firms are borrowing billions to build data centres, and a growing share of that debt sits in ordinary pension and retirement funds. Regulators in several countries have started asking whether the spending is justified by near-term revenue.
Fabs, vacuum and the hardware behind the boom
Making the chips is as difficult as designing them. Fabrication depends on ultra-high vacuum at nearly every step, from single silicon crystal growth and chemical vapour deposition to sputtering, ion implantation and plasma etching. Every rotating part that enters a vacuum chamber has to be sealed without contaminating the process, which is why vacuum rotary feedthroughs and other sealing components have become a quiet bottleneck in the supply chain. Chinese humanoid robot maker Unitree Robotics soared more than 600 percent on its market debut in the same week, despite a US ban on its hardware, showing that capital is still chasing physical AI.
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