Ray Dalio said the biggest investing mistake currently is chasing artificial intelligence stocks instead of maintaining a diversified portfolio [1, 2].

This warning comes as investors flood the AI sector, potentially ignoring the risks of concentration in a single technology. Dalio said that a lack of diversification could leave portfolios vulnerable if the market corrects or if specific companies fail to monetize the technology.

Speaking at the Forbes Iconoclast Summit, the billionaire investor and founder of Bridgewater Associates addressed the current trend of betting heavily on AI [1]. He said that investors are betting on the wrong thing by focusing solely on the stocks of companies developing the technology [2].

Dalio said that AI as a technology may succeed even if the specific companies behind it fail [1, 2]. This distinction suggests that while the broader impact of AI on the global economy could be positive, individual corporate success is not guaranteed.

Because of this risk, Dalio said diversification is essential to protect investors [1, 2]. By spreading assets across different sectors, and types of investments, investors can mitigate the impact of a potential collapse in any single AI-related firm.

Dalio's approach emphasizes a balanced strategy over the high-risk pursuit of a single trend. He said that the mistake of over-concentration could be particularly costly for certain investors, including those in Canada [2].

The biggest investing mistake right now is chasing AI stocks instead of maintaining diversification.

Dalio's warning highlights a common tension in financial markets between 'thematic investing' and 'risk management.' While AI is a transformative technology, the financial value of that transformation may not accrue to the first wave of companies that developed the tools. By advocating for diversification, Dalio is reminding investors that technological breakthroughs do not always translate into sustainable equity returns for every participant in the sector.