Warren Buffett and the AI bubble: reading his silence

Why does Warren Buffett’s silence matter in the AI bubble debate?

Buffett is the investor many people watch for a signal about prices. When he speaks about a sector, markets listen. When he says nothing, readers fill the gap with guesses, and the guesses often become headlines. This page avoids that. It reports only what is public and marks every inference as an inference. Readers who want a clear answer should know that this page offers a method and no verdict on the AI bubble.

Silence is data of a weak kind. It can mean disinterest, a sector outside one’s expertise, or a view that is not ready to share. It rarely means a secret warning. The sound approach is to look at what Berkshire did, which is documented, instead of what Buffett did not say, which is not.

How large is the Warren Buffett cash pile, and how fast did it grow?

Berkshire reported cash and short-term investments of $381.7 billion at the end of the third quarter of 2025, a new all-time high (Yahoo Finance). A year earlier the figure was $325.2 billion. The gain is about $56.5 billion in 12 months, which shows steady accumulation and no sudden move.

Size matters because it is a choice. A company that earns more than it can invest at good prices lets cash build up. Berkshire has the means to buy almost anything. A record pile therefore reflects a judgment about available opportunities, and the judgment may concern the whole market, not AI alone. Spread over 12 months, the gain averages about $4.7 billion a month. A pile that grows at that pace takes years to build and years to deploy, so it tells you about a policy and not about a single week of news.

What do missing Warren Buffett buybacks say about stock prices?

Berkshire bought back no shares in the third quarter of 2025, as it had not in earlier quarters (Yahoo Finance). A buyback is usually read as a sign that management sees its own shares as good value. No buyback leaves the question open: shares may be fairly priced, or management may see better uses for cash.

This point concerns Berkshire’s own stock and not AI stocks, so it is indirect. It adds to the pattern of caution and does not prove a view on AI. Keep indirect evidence in a separate column of your notes, so it never gets counted as direct evidence.

What are the three ways to read Warren Buffett’s cash pile?

Reading 1: caution about prices in general. A large cash pile is what a patient buyer holds when it sees little value. Reading 2: scarcity of deals. Berkshire is so large that only very big purchases move its results, and few such purchases exist at a fair price. Reading 3: transition. A new chief executive takes over, and cash keeps options open.

Each reading predicts something different. Caution predicts a rise in cash as markets climb. Scarcity predicts that cash falls the day a large deal appears. Transition predicts changes of pattern under the new leader. Watching the next filings against these predictions turns a guess into a test. Write the three predictions in a note today, with the date. When the next quarterly report arrives, tick the prediction that matched. After 4 reports, the tally shows which reading the evidence favours.

How does Warren Buffett’s step-down change the AI bubble reading?

Buffett was due to step down as Berkshire’s chief executive at the end of 2025, with Greg Abel expected to take over (Yahoo Finance, November 2025). The third quarter report was the last issued under his tenure as chief executive. A change of leader can change the capital allocation style, so earlier patterns carry less weight.

For an AI bubble reader, this means that the cash pile of September 2025 reflects his period. Later filings under the new leadership are a separate series. Compare them, and note the date at which the pattern changes, instead of extending the earlier pattern forward by habit.

How does Warren Buffett’s behaviour compare with other AI bubble voices?

Other voices speak and Berkshire acts. Michael Burry filed put options and published an accounting argument. Sam Altman said investors look overexcited. Ray Dalio described a stage. Berkshire’s evidence is a balance sheet, which cannot be misquoted and says less. Together the voices cover statements, positions, and behaviour. The comparison also shows a gap: Berkshire gives no reasons, while the other voices give many.

No voice alone is decisive, and weighing them takes a method. Check the source, the date, and the stake of each, as the guide on who says AI is a bubble explains. A balance sheet has the advantage of a clear source, and the disadvantage of many possible meanings.

How can you use Warren Buffett’s cash pile to think about the AI bubble?

Turn the lesson into your own rule. Decide in advance what share of your portfolio or budget stays liquid, and what price levels or events would change that share. A written rule beats a reaction to a headline. Berkshire’s pile is an example of a policy held through changing markets.

This page is general information as of October 2026, not investment advice. If an AI exposure sits inside a decision of yours, the EQOS Asia pricing page lists the diagnostic formats that size the exposure and score the options with a method you can recompute. The wider series on the AI bubble places each voice in context.

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About the author

Stéphane Jambu

President, EQOS Forecast Asia

Stéphane Jambu leads EQOS Forecast Asia and works as a consultant in e-commerce, search visibility, and AI. LinkedIn profile