Wall Street Veteran Rosenberg: U.S. Stock Valuations and Leveraged Positions Hit 40-Year Extremes
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David Rosenberg — the economist who warned of the 2008 housing bubble — says US equity valuations, leverage, and investor positioning have hit extremes unseen in his four-decade career. He has shifted into Treasuries and overseas stocks.
What exactly has he never seen before?
Speaking at Grant's Annual Fall Conference, Rosenberg said valuations, leverage, and investor positioning are all at extremes simultaneously — something he has not witnessed in forty years.
He stopped short of calling it a bubble outright, but was blunt: "What I'm seeing now is something I've never seen before."
This means → His concern is not just that stocks are expensive. It is that multiple risk dimensions are maxed out at once, with no historical parallel.
How does this bull market differ from the dot-com bubble?
Rosenberg argues today's rally depends on the trajectory of AI progress far more than the late-1990s market depended on tech.
In plain terms = During the dot-com era, bets were spread across many tech companies. This time, nearly all the chips are on one theme — AI.
He called the US "the epicentre of a tech boom" but added that investors are paying too much for entry.
Why are consumers caught in this too?
Rosenberg flagged a deeper fragility: American consumers increasingly rely on further stock-market gains to fund their lifestyles.
This means → A market reversal would not just hit brokerage accounts — it would directly squeeze everyday spending and living standards.
His sharpest example: early retirees living off portfolios. "What are they going to do — go get a job as a cashier at Walmart? Only to find that job has been taken by a robot?"
Where is he putting his own money?
Rosenberg has shifted into US Treasuries and overseas equities, moving away from US stocks.
This reflects more than a bearish call — he is backing his judgment with real capital allocation.
Important context: Rosenberg is the former chief North American economist at Merrill Lynch, known for a persistently bearish stance. He rose to prominence by warning of the housing bubble before 2008. Whether this latest warning proves right amid an AI-driven bull market remains to be seen.
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