Citadel's Ken Griffin Says AI Stocks Are Likely in a Bubble, But Not a Reason to Sell

Ken Griffin, the founder and chief executive of Citadel, has a view on artificial intelligence stocks that many investors may not expect. The sector is probably in a bubble, he suggests, but that does not mean holders should rush for the exits.

The distinction matters. Enthusiasm for AI has pushed the prices of many companies tied to the technology well ahead of their current earnings, with valuations that lean heavily on growth still to come. Calling that a bubble is a warning about price, not a verdict on the underlying technology. Griffin's position, as summarized in coverage of his remarks, is that the technology may still produce lasting value even if some of today's valuations overshoot.

For investors, that leaves a difficult job. Within a frothy theme, some companies will eventually fail to justify their prices while others may grow into them. A blanket decision to sell everything tied to AI, or to hold everything without question, tends to ignore that split. Telling the two apart requires looking at individual businesses rather than the sector as a whole.

Griffin's comments carry weight because of Citadel's size and reach in global markets. When a leader of one of the largest trading and investment firms says a sector looks overheated, it draws attention, even when the message is not a call to sell. Investors weighing their AI exposure may read his remarks as a reminder to check how much of their portfolio depends on one theme, and whether they are holding on by conviction or by momentum.