A surge in artificial intelligence infrastructure spending is lifting GDP and driving market optimism, but some experts warn the boom could be concealing underlying economic weakness.

Global AI investment is forecast to reach $375 billion in 2025 and top $500 billion by 2026, according to UBS . That flood of capital is reshaping how and where money is flowing across the economy.

"It's the start of trillions being spent in this build out of the fourth Industrial Revolution," said Dan Ives, managing director at Wedbush Securities.

"Big tech right now is doing the equivalent of building Vegas in the 1950s where there was just sand. Dubai 30 years ago. That's what's happening with this AI infrastructure build out from the chips to the data centers to the grid. You're really building out t

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