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Billionaire Mark Cuban Compares the AI Buildout to the Dot-Com Era Fiber Glut. Here's What That Could Mean for AI Stocks.

Cuban sees troubling parallels between the two tech-sector infrastructure booms.

Billionaire Mark Cuban Compares the AI Buildout to the Dot-Com Era Fiber Glut. Here's What That Could Mean for AI Stocks.

Published August 20, 2026 · Category: Finance

Overview

Mark Cuban recently warned that the current artificial intelligence (AI) build-out -- the race to build as many data centers as possible as quickly as possible -- has echoes of 1999.

The billionaire thinks the build-out rhymes with the race to lay internet-enabling fiber optic networks in the late 1990s -- a somewhat underdiscussed aspect of the dot-com boom and eventual bust.

Details

So, given that AI companies now make up something like 40% of the value of the S&P 500 (SNPINDEX: ^GSPC), should investors be worried?

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Source

Originally published at www.fool.com.

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