Best Small-Cap ETFs for 2026 and How to Invest

Should you invest in small-cap ETFs?

Tilting toward small caps can be one of the more academically grounded ways to potentially outperform the broader market over long periods.

However, the strategy is only useful if you can actually stick with it through periods of underperformance. That has not been easy over the past decade. Large-cap technology stocks, especially the “Magnificent Seven,” dramatically outpaced many small-cap strategies.

Investors with a dedicated small-cap tilt had to watch some of the market’s biggest winners surge ahead while continuing to trust the long-term research behind the size premium. That requires patience and conviction, especially since factor investing often only proves itself over a full market cycle rather than a year or two.

For that reason, investors considering small-cap ETFs should approach them with a long-term perspective, ideally a decade or more. If you do commit to the strategy, focus less on chasing the best recent returns and more on understanding the methodology behind the small-cap ETF.

For passive funds, pay attention to the underlying index construction and screening rules. For active approaches, evaluate the manager’s process and long-term track record. Above all, keep costs in mind. Fees compound negatively over time, and every additional percentage point paid in expenses reduces your long-term returns.