Cuban Warns of AI Data Center Debt Bubble

The investor says today's AI systems are not truly intelligent while companies borrow heavily to fund computing capacity.

Updated on Nov. 2, 2026 in Artificial Intelligence

Isometric editorial illustration of unlabeled cooling units and cable conduit along a windowless data center wall under flat daylight. — Investor Mark Cuban warned on Steven Bartlett's podcast that companies are borrowing heavily to fund AI data centers, forming a potential debt bubble. AI Illustration. Upload story photo >

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Investor Mark Cuban said Elon Musk is the best entrepreneur of their lifetimes while calling him a salesman, in remarks on Steven Bartlett's The Diary Of A CEO podcast. The comments are opinion and commentary, not a product or technical development.

Why it matters

Cuban's remarks land amid a broader debate over whether AI investment is outrunning its returns. He argued that today's AI systems are not truly intelligent and warned that companies are borrowing heavily to fund data centers and computing capacity, which he framed as a potential AI-related debt bubble.

The remarks are opinion rather than measured evidence, so no benchmarks or performance figures were cited. The one concrete claim is that companies are borrowing heavily to finance data centers and computing capacity, a figure the source does not quantify.

The players

Mark Cuban

Investor and entrepreneur known for his stake in the Dallas Mavericks and his role as a judge on ABC's Shark Tank.

Elon Musk

Founder and chief executive of Tesla and SpaceX, whose ventures require substantial capital commitments.

Steven Bartlett

Host of The Diary Of A CEO podcast, on which Cuban made the remarks.

The details

Cuban made the comments in response to host Steven Bartlett's question about whether Musk's predictions were running ahead of reality. He said Musk raises large sums of money for his projects and is good at it, and he described Musk's ambitions as requiring enormous amounts of capital. Cuban also said that today's AI systems are not truly intelligent, a view he used to frame his skepticism about the scale of current AI spending. The two have exchanged criticism on social media.

Cuban's remarks on The Diary Of A CEO podcast were made last week, relative to November 2, 2026.

The Tech Race

Cuban's comments add a voice from the investor class to the debate over whether the capital flowing into AI infrastructure is justified by current capabilities. The source does not place his remarks against a specific competing effort, roadmap, or benchmark.

The remarks do not change any product, price, or availability, so there is no direct effect on users at this time. Readers following AI companies' finances may watch whether heavy borrowing for data centers continues, but the source gives no timeline for any such change.

The takeaway

Cuban's comments put a sharper question to AI investment: whether borrowing for computing capacity is matched by systems that deliver the intelligence being promised. Watch for disclosed debt levels in companies building AI data centers as the clearest test of his warning.