Nvidia's Circular Investment Model Raises Durability Fears

A debate has emerged around the financial durability of the AI infrastructure buildout, centred on Nvidia's deepening financial ties to its own ecosystem. Jensen Huang has publicly stated that if Nvidia had not helped CoreWeave exist, they would not exist. CoreWeave, in turn, is a key customer for Nvidia chips. Iren, another Nvidia-backed infrastructure play, presents a similar dynamic. The pattern suggests that Nvidia is not just benefiting from organic AI capex demand but is actively financing its own customer base, raising questions about whether the supercycle is genuinely market-driven or circular.

Investors and analysts have begun flagging this concern under the umbrella of what's being called the "circular investment theme." Nvidia's buildouts fit squarely into this narrative, according to social chatter among traders. The company has also invested in or supported Corning, various semiconductor equipment makers, and data centre operators. This vertical integration of capex and financing creates a self-reinforcing loop: Nvidia funds infrastructure, those companies buy Nvidia chips, and the cycle accelerates. While venture capital has long worked this way, the scale and speed in AI are unprecedented.

The concern is sharpest among valuation-conscious investors and those tracking bubbles. If the circular capital flows reverse, AI capex could collapse faster than organic demand would suggest. Conversely, if the ecosystem truly benefits end-users (hyperscalers, enterprises) and drives genuine productivity gains, the model is simply the natural evolution of a dominant infrastructure platform. The distinction matters enormously for equity valuations and sector momentumThe empirical fact that winners keep winning over the medium term..

Scepticism is growing among some analysts who note that mega-cap software and premium SaaS names have already repriced hard in 2026. The brutal risk-off tape for "high-quality" names like Atlassian, Datadog, and others suggests that investors are already questioning the return on AI capex. The burden of proof now rests on companies demonstrating that AI investments generate meaningful returns, not just capital velocity.