How to create a portfolio with only index funds

Summary: Index investing is no longer just about large caps. With index options across market sizes, geographies and commodities, you can build a fully passive equity portfolio. The right mix depends on how much volatility you can live with while staying invested long term. Most investors begin their passive investing journey with a simple large-cap index fund. It is familiar, broad and dependable. Yet the index universe has expanded far beyond that. Today, you can build an entire equity portfolio using index funds alone because there are now options across large caps, mid caps, small caps, global equities and commodities. With this wide array of options comes a practical question. How can a long-term investor build a fully passive portfolio to match their temperament and their goals? Let’s find out how, depending on your risk profile. The aggressive investor If you are someone who can stay calm through sharp market swings and you have time on your side, your portfolio can look like this: A large-cap allocation of 20 to 30 per cent, so that the overall structure does not feel unstable. The real power can come from mid and small caps. Together, they may form 40 to 50 per cent of your allocation. These segments often move dramatically in both directions, and they can go through deep corrections. However, over long periods, they have historically rewarded patient investors with stronger compoun

This article was originally published on January 01, 2026.