Skyrocketing AI infrastructure outlays have raised investor concerns over future returns and the potential for a bubble

US technology stocks tumbled sharply after Amazon, Microsoft, Google, and Meta announced plans to spend a combined $660 billion on artificial intelligence in 2026. Investors worried the companies’ capital expenditures could outpace the technology’s earnings potential.

Amazon, Google, and Microsoft have lost a combined $900 billion in market value since reporting quarterly results last week. The companies’ spending plans exceed the GDP of Israel and overshadow strong growth in the companies’ cloud businesses.

“AI bubble fears…

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