Nvidia's margins slip

Nvidia reported fourth-quarter revenue of $39.3 billion, evidence that demand for its chips is still enormous. Investors looked past it to a rare flaw. Gross margin slipped to 73 per cent, and the company guided to about 71 per cent for the current quarter, down from peaks in the high 70s. Equity analysts started asking questions straight away.

Strong numbers, soft reaction

The headline figures would be the envy of any other company. Revenue rose by 78 per cent from a year earlier, nearly all of it from data-centre customers, and the company said Blackwell chips brought in $11 billion in their first full quarter of sales. It forecast about $43 billion of revenue for the current quarter. The shares still fell by more than 8 per cent the next day, a sign that the market now judges Nvidia on the quality of its growth rather than the quantity.

The reaction also reflects how much was already priced in. Nvidia became one of the world's most valuable companies on the premise that its margins, unusually high for a hardware maker, would hold as revenue compounded. A company valued on that basis is vulnerable to any sign that the second half of the premise is weakening, even when the first half is intact. January's sell-off after DeepSeek had already shown how quickly sentiment can turn.

Blackwell is hard to build

The lower margin follows directly from ramping up production of Blackwell, a far more complicated architecture. Moving to advanced chiplet packaging, liquid cooling and very dense server racks brings poor early yields and more scrapped units. In the first stage of any production ramp, the cost of each early unit dilutes gross profit until volume and experience on the factory floor bring costs back down.

The product has already had a difficult birth. Nvidia admitted last year that a design flaw had hurt Blackwell's early manufacturing yields and required a fix, and its flagship systems link 72 graphics processors in a single liquid-cooled rack, a far harder thing to assemble and test than the eight-chip servers of the previous generation. Much of that work happens at partners, but the cost of reworked and rejected units shows up in Nvidia's accounts.

The bottlenecks sit along a short chain. TSMC fabricates the chips and joins them in its advanced CoWoS packaging, whose capacity it has been expanding as fast as it can. SK Hynix and other memory makers supply the high-bandwidth memory stacked beside each processor. Taiwanese assemblers such as Foxconn and Quanta then build the racks. Nvidia pays for components and packaging whether or not the finished system passes its tests, so a failure late in the chain costs far more than one caught early, which is why rack-scale products are so much harder on margins than single chips.

A familiar pattern in chipmaking

Margin dilution during a ramp is routine in semiconductors. TSMC, which makes Nvidia's chips, regularly warns investors that each new manufacturing node weighs on its gross margin for the first couple of years before volumes and yields catch up. Nvidia's management has said much the same, telling analysts that margins should return to the mid-70s later in the fiscal year as Blackwell production matures. On that view the dip is temporary and the columnist's worry premature.

The complication is the pace of Nvidia's own product cycle. The company now plans a new data-centre architecture roughly every year, and an upgraded Blackwell Ultra is due in the second half of this year, with details expected at its developer conference in March. If each launch brings its own ramp costs, the dip in margins stops being a one-off and becomes a recurring feature of the calendar. The mature, high-margin phase of each product gets shorter.

Even Nvidia has limits

Customers still cannot get enough of its products, but the dip shows that a dominant supplier is still bound by the physical costs of making semiconductors. Hyperscalers are also starting to scrutinise their total cost of ownership and the return on what they spend on compute, which will make seventy-five per cent gross margins harder to hold.

The pressure on pricing is building from several directions. Google, Amazon and Microsoft all design their own AI chips, partly to reduce their dependence on Nvidia, and DeepSeek's claims in January of cheap training reminded buyers that software efficiency can substitute for hardware. None of this dents demand today, but it gives the biggest customers more leverage in each new round of negotiation.

Policy adds a further squeeze. In January the outgoing Biden administration published rules capping exports of advanced AI chips to much of the world, due to take effect in the spring, on top of existing curbs on sales to China. The new administration has not said whether it will keep them. Revenue from restricted markets tends to come from cut-down chips that earn less, so tighter rules would weigh on both volumes and the mix of what Nvidia sells.

Lessons from the last buildout

The precedent that worries long-term holders is Cisco in 2000. It was the indispensable supplier of the internet buildout, with high margins and customers queuing for its routers, and its orders collapsed within months once telecoms carriers stopped spending. Nvidia's customers are richer and pay from cash flow rather than debt, which makes a sudden stop less likely. The lesson is that a supplier's margins depend on its customers' willingness to keep spending, and that can change faster than the order book suggests.

What to watch

The test is whether gross margin recovers as the ramp matures, as management promises, or settles lower as customers push back. Capital spending plans at the largest cloud companies, which have so far kept rising, are the other gauge: a pause there would hurt volumes and pricing at the same time.

Even a recovery to the mid-70s would leave the company more exposed than before to manufacturing risk and customer bargaining. Nvidia's easiest years of extraordinary profit on AI chips are probably behind it, and from here margins will depend on how well it handles difficult manufacturing and on buyers who now check their procurement budgets more closely, which makes the gross-margin line in each of the next few quarterly reports more important to the share price than revenue.