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AI BOOM DRIVEN BY EARNINGS BUBBLE, NOT VALUATIONS — BCA

The AI investment boom has the hallmarks of an earnings bubble rather than a valuation bubble, BCA Research warns -- and while a bust is inevitable, it doesn't appear imminent.

Unlike classic bubbles where P/E ratios balloon as prices outrun profits, the AI frenzy is being driven by a parabolic surge in semiconductor earnings that is keeping valuations artificially subdued, BCA said, drawing parallels to banking and homebuilding stocks ahead of 2008, which both fell around 80% peak to trough.

At the heart of today's dynamic is a paradox: big tech's hyperscalers -- Amazon, Microsoft, Alphabet and Meta -- are seeing free cash flow crater under massive AI capital expenditure even as reported profits soar. BCA estimates these companies could hold $2.5 trillion in AI assets by 2030, implying $500 billion in annual depreciation, exceeding their combined 2025 earnings of $405 billion.

The risks extend beyond markets. U.S. households hold an estimated $74 trillion in equity wealth, roughly half in tech. A sustained 20% decline could shave consumer spending by nearly 2% of GDP.

BCA cautioned investors not to rely on Wall Street for early warnings -- in past cycles, share prices peaked six to 10 months before analysts cut earnings estimates, with IT stocks already down 30% by the time they acted.

For now, BCA's proprietary AI demand indicators remain broadly reassuring, though early signs of plateauing are emerging in AI coding assistant adoption.

(Karen Brettell)

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