More evidence that broad-market index funds remain unbeatable, even in the era of AI stock-picking

A new report finds that despite the growing use of artificial intelligence in investment research, selecting stocks that consistently beat the market has not become easier this year. The finding adds to a long-standing body of evidence favoring broad-market index funds over active stock selection.

The result is notable because AI tools were widely expected to sharpen forecasting and give active managers an edge. Instead, the report suggests that widespread adoption of similar tools may simply raise the overall level of competition, making any advantage harder to sustain. When many participants analyze the same data with comparable methods, mispricings can be spotted and corrected faster.

For investors, the takeaway is less about any single stock or fund and more about expectations. The debate over active versus passive management is unlikely to be settled by technology alone, and past performance never guarantees future results. What to watch: whether AI-driven strategies show measurable outperformance over longer periods, and how fees and turnover affect the net returns investors actually keep.