In this edition of The Motley Fool's "Ask a Fool" series, Motley Fool One analyst Jason Moser and Motley Fool Stock Advisor analyst Brendan Mathews take a question from a reader who asks: "Are small cap, and emerging market index funds good idea, or are these two areas where the expertise of a managed fund is worth the cost?"

Brendan is skeptical of the idea that investors need an active manager for U.S. small-cap stocks, and Jason points out the diversity benefits of an index fund. As for emerging-market stocks, Brendan believes this is an area where active management may add value, as the big emerging index funds tend to be heavily populated with large state-owned enterprises that consider serving stockholders a secondary priority. Jason points out an alternative strategy for gaining exposure to emerging markets -- global blue chips with exposure to these markets.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.