Rosenberg Says U.S. Stocks Are Becoming a Bubble as Metrics Hit Unseen Extremes in 40 Years

David Rosenberg stated that the U.S. stock market is increasingly resembling a bubble, with valuations, leverage, and investor positioning at unprecedented extremes not seen in his 40-year career. Rosenberg, founder of Toronto-based Rosenberg Research & Associates, believes the current bull market's reliance on artificial intelligence (AI) progress far exceeds the tech sector's influence before the internet bubble. He noted he has been buying U.S. Treasuries and foreign stocks, calling the U.S. a 'tech boom center' where investors are paying too high a price. He specifically pointed out that consumers are increasingly relying on further stock market gains to fund their lifestyles.