Memory Chip Stocks Defy Valuation Math as AI Demand Sustains Rally Despite Frothy Multiples

The semiconductor sector has entered a regime where traditional valuation metrics have become almost irrelevant. NVIDIA, trading at elevated multiples even after its $1 trillion market-cap gain since May 5, continues to attract capital on the assumption that AI capex will remain insatiable through 2026 and beyond. Memory chip prices, driven by demand for GPU-adjacent components, have kept module costs elevated enough that semiconductor companies are defending margins despite appearing "expensive" on historical P/E comparisons.

Cerebrases Systems' IPOInitial Public Offering - a company's first public sale of stock. on May 15, which raised $5.55 billion and exceeded analyst expectations, served as a validation of the AI infrastructure narrative. The successful pricing sent a signal to investors that the market rewards any company with credible AI compute exposure. NVIDIA's H200 export approval to China simultaneously widened the TAM, further justifying the high multiples. Meanwhile, AMD, which faces supply constraints from geopolitical tensions (North Korea, Iran), continues to attract buyers despite lower absolute stock gains than NVIDIA.

Broadcom, Arm Holdings, and other semiconductor adjacents have also participated in the rally, with some traders noting that even moderately valued exposure to AI infrastructure gains multiples. However, Bloomberg analysis flagged that this dynamic is unsustainable if capex cycles cool or if large hyperscalers (Amazon, Microsoft, Google) finally announce satiation with GPU purchases. Several of these companies are at nosebleed valuations, meaning a single earnings miss could trigger sharp drawdowns.

The risk is crowding. Bank of America strategists warned that profit-taking could sweep equities in early June as investors crowd into the same handful of mega-cap AI plays. If a reversal begins, it will likely start in memory names, where valuation cushions are thinnest. Skeptics point to the 2000 dot-com bubble parallels: momentumThe empirical fact that winners keep winning over the medium term.-driven buying disconnected from reasonable cashflow multiples, fueled by institutional fear of missing out.