AI fever ignites a boom in thematic ETFs as fund managers hunt for their next big hit

The success of the artificial-intelligence trade has sharpened investor appetite for the next major market theme, and fund managers are responding with a growing pipeline of narrowly focused products. Thematic ETFs targeting areas such as robotics and the emerging space economy are part of this wave, offering exposure to specific narratives rather than broad market benchmarks.

For investors, the appeal is straightforward: thematic funds promise targeted participation in long-term trends. But the structure cuts both ways. Concentration in a single theme can amplify both gains and losses, and the timing of a fund's launch often coincides with peak enthusiasm for its subject—a dynamic worth keeping in mind when evaluating new offerings.

What to watch: how these funds perform once the initial buzz fades, whether they attract sustained inflows or lose assets after launch, and how fees compare with broader alternatives. Thematic investing is ultimately a bet on a narrative playing out as expected. As the roster of products expands, scrutiny of underlying holdings, index methodology and expense ratios becomes more important than the theme's headline appeal.