Hyperscaler AI capex boom sustains chip demand despite valuation skepticism

Palantir highlighted a critical inflection: hyperscalers are committing USD 725 billion to AI infrastructure, and US revenue is doubling year-over-year for platforms that serve them. Broadcom is poised to capture 60% of the custom AI chip design services market by 2027 per Counterpoint Research, as Meta, Amazon, Google, and others internalize silicon design. Broadcom's AI revenue surged 106% year-over-year to USD 8.4B, yet the market is still undervaluing the sustained capex cycle that underpins these gains. AMD ran 47% year-to-date on the strength of an RXT enterprise-AI cloud MOU, with MKTBOX scoring the story as right but the price finally caught up.

Equipment makers are also racing to capitalize. Flex CEO Revathi Advaithi is spinning off Flex's AI infrastructure business as a USD 6.5 billion standalone entity, betting that the capex cycle will sustain through 2027. Cerebras Systems increased its IPOInitial Public Offering - a company's first public sale of stock. target to USD 4.8 billion amid demand for AI chipmakers and data center inference. Innio, a gas engine manufacturer backed by Advent, filed for IPO to tap the surge in data center spending, signaling that infrastructure vendors across the stack are seeing unprecedented order backlogs.

The debate centers on capex sustainability. Bulls argue that custom silicon adoption is structural; hyperscalers cannot compete without in-house AI chips, and heterogeneous architectures (GPU, ASIC, FPGA mixes) create ongoing design services demand. Bears worry about overcapacity post-2026 and cite Amazon's negative USD 18 billion quarterly free cash flowCash generated after maintenance capex; the actual money the business throws off. despite 45% long-term stock performance, raising questions about whether capex intensity is approaching peak. Goldman's valuation metrics for semiconductor growth stocks show divergence: growth scores at 91 but valuation scores languish at 38, signaling consensus is priced in.

Across supply chains, power and logistics remain bottlenecks. Duke Energy applied for Department of Energy loans to support power infrastructure for data centers, and Hyperscale Data's Omnipresent Robotics is deploying AGIBOT intelligent robots for teleoperation and embodied AI training, suggesting that capex extends beyond chips into ancillary infrastructure. If hyperscaler capex moderates in H2 2026, semiconductor stocks could face a sharp repricing.