Liz Ann Sonders, chief investment strategist at Charles Schwab, argues that supply chain constraints pose a greater threat to the current AI infrastructure buildout than elevated market valuations. Speaking on Yahoo Finance's Sozzi Unleashed show, Sonders stated that the primary concern should be access to necessary equipment, specifically AI and memory chips, rather than a potential faltering in demand. She noted that if technology companies cannot secure this hardware, they will be unable to meet robust profit predictions, which could ultimately deflate the sector.

Sonders described the supply chain issue as a topic that is less discussed in current market analysis. She also pointed out that while artificial intelligence may be disinflationary over the long term, the immediate cost of the buildout is inflationary. The significant increase in construction costs is a factor that could slow the pace of AI development, she added.

The debate over an AI bubble remains a central focus for investors, with market concentration reaching historic levels. According to data from Creative Planning, the S&P 500 has never been more concentrated in just three stocks than it is today. Nvidia, Apple, and Microsoft currently represent over 21% of the index. This level of dominance exceeds that of previous market leaders; in the mid-1980s, IBM, AT&T, and ExxonMobil made up 13.4% of the S&P 500 at their peak.

Fund manager sentiment reflects these tensions. BofA's latest fund manager survey identified being long global semiconductor stocks as the most crowded trade in October. Meanwhile, the risk of an AI bubble bursting was the second-highest concern on fund managers' minds, trailing only rising Treasury yields. Sonders suggested that these combined pressures warrant careful consideration regarding potential headwinds for AI growth.