Nvidia's circular capex investment sparks durability concerns

The relationship between Nvidia and its infrastructure customers has become a focal point of concern for skeptical investors. Nvidia has made direct investments in and partnerships with companies like CoreWeave, Iren, and others building out AI data center capacity. CoreWeave's CEO stated publicly that if Nvidia had not helped CoreWeaver exist, the company would not exist. This dependency dynamic raises questions about whether the capex cycle is driven by genuine, profitable AI demand or circular self-reinforcement.

The concern is structural: Nvidia sells high-margin GPUs to infrastructure companies; those companies build data centers; those data centers then consume more Nvidia GPUs. Each layer of this circular flow requires justification by end-user AI applications that generate returns. If the end-user AI capex ROI disappoints, the entire edifice risks unraveling. Tech analyst commentary has already shifted from discussing 'where the AI rally goes next' to obsessing over 'when this will collapse,' a classic sign of late-cycle sentiment.

Nvidia's stock has lagged the broader semicon cohort despite strong analyst sentiment, which some interpret as early stage of rotation out of the mega-cap AI hardware leader. Goldman Sachs' recent Broadcom reset and CoreWeave's emphasis on AMD competition further suggest the market is starting to hedge away from single-chip-leader dominance.

The bull case rests on the durability of AI productivity gains and the trillions in capex required to build out global AI infrastructure. Nvidia's moatA sustainable competitive advantage that protects long-term returns on capital. remains powerful. However, the bear case, that circular investment will hit a ceiling when ROI metrics deteriorate, has gained traction as valuations have extended. A quarterly report showing weaker capex guidanceCompany-issued forecasts of future financial performance. or slower bookings for future quarters could trigger a sharp revaluation.