How to avoid a stock market bubble

Investors can never reliably time a bubble, but they can protect themselves
How to avoid a stock market bubblePublished on December 18, 2025

What began as quiet murmurs has now become a regular fixture of investment conferences, round-table debates and financial commentary. Are we in an artificial intelligence (AI)-induced stock market bubble, and what might valuations look like next year?

The opinions vary widely, but history provides a familiar backdrop. Investors have lived through manias before – tulip mania in the 1630s, railway speculation in the 1840s and the South Sea Bubble of the early 18th century, to take just a few early examples.

Yet even these distant periods offer a valuable framework for asking questions about today’s market conditions.

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