Investors wrestle with AI capex peak and circular investment risk

Beneath the euphoria of the semiconductor rally sits an uncomfortable question: Is the AI capex cycle self-sustaining or circular? Nvidia has been seeding hundreds of millions into startups and infrastructure vendors (CoreWeaver for cooling, Iren for optical interconnect, Corning for advanced substrates) that sell back into the data center ecosystem. Critics argue this resembles a pump-and-dump where Nvidia inflates demand for its own chips by financing the vendors who consume them. If investment dries up, the entire apparatus collapses. The debate echoes dot-com logic: venture capital funded ISPs to buy routers; the routers needed more data centers; the data centers needed more capital.

This concern has not deterred equity investors. Blackstone's Jon Gray outlined a career-shortening $26 billion bet that ultimately returned $14 billion in gains, illustrating how large allocators are chasing infrastructure buildouts despite durationBond price sensitivity to interest rate changes. risk. The private credit market has swollen to $1.8 trillion, and redemption requests have risen as investors become jittery. Pimco's CIO warned that the Iran war could force the Fed to raise rates rather than cut, which would severely damage venture-backed infrastructure plays reliant on low-cost capital. Analyst commentary on data-center power and cooling names (Eos Energy, Vertiv suppliers) reflects heightened volatility as traders grapple with whether the tailwind is structural or speculative.

The implications are recursive: if AI capex slows, semiconductor stocks compress, but so do all infrastructure vendors, private credit returns deteriorate, and venture fundraising seizes. This is why small-cap infrastructure plays like AEHL, RXT, and MRAM are seeing binary price action (ranging from euphoric 100x bets to crash predictions). Large-cap winners (Nvidia, AMD, Broadcom) have more diversified customer bases and can weather a slowdown; smaller suppliers do not. Meanwhile, Alphabet is being repositioned as the AI capex beneficiary with 'the most of the stack,' implying it can monetize infrastructure without the circular-investment problem. Investors are rotating out of pure chip plays into Alphabet and Microsoft on this thesis.

The Fed's policy path is crucial. If the Iran war forces rate hikes, venture capital dries up instantly, and circular investment schemes unwind. If the ceasefire holds and inflationThe rate at which prices rise across an economy. moderates, the capex cycle can continue on fundamentals. The next two weeks will be decisive: US CPI data, the Trump-Xi summit, and semiconductor earnings guidanceCompany-issued forecasts of future financial performance. will all inform whether the AI boom is durable.