Investors Rethink the Cost of Chasing AI Dreams

Investors Are Rethinking AI’s Trillion-Dollar Spending Spree

Stocks opened the week at record highs, but momentum has faltered. The S&P 500 (SPX -0.50%) has now dropped three straight sessions, down 1.3% overall.

Some of the weakness can be traced to stronger economic data that pushed bond yields higher, along with Fed Chair Jerome Powell’s cautious stance on rate cuts and his warning about lofty equity valuations.

But there’s also a bigger question hanging over the bull market: whether Wall Street’s AI boom has gone too far.

That mood shift may have started Monday, when Nvidia’s Jensen Huang and OpenAI’s Sam Altman unveiled plans for a $100 billion investment during a CNBC interview. By Thursday, hedge-fund billionaire David Einhorn gave voice to growing unease.

Speaking at the New York Stock Exchange, the Greenlight Capital founder warned that the enormous sums earmarked for AI infrastructure—hundreds of billions annually—risk destroying vast amounts of capital, even if the technology itself proves transformative.

“The numbers being thrown around are so extreme that it’s really hard to understand them,” Einhorn said, according to Bloomberg. “There’s a reasonable chance that a tremendous amount of capital destruction is going to come through this cycle.”

His skepticism mirrors his long-running complaints about market inefficiency, from frenzied crypto bets—he once called it the “fartcoin stage” of the cycle—to today’s AI arms race.

Einhorn also flagged faltering U.S. job growth and shrinking workweeks as signs the economy may already be in recession.

And the shift in AI sentiment is spreading. On Friday, CNBC’s Jim Cramer wrote on X that while he once saw endless praise for the data center buildout, he now sees only warnings of bubbles, waste, and an impending crash.