Most investors know which ETFs they own. Far fewer understand what they actually own. Learn how to build an Excel ETF exposure tracker that uncovers hidden overlap, measures true diversification and helps you make more structured long-term investment decisions.

Many investors believe they are diversified because they own multiple shares, funds or ETFs. The reality is often very different. This guide reveals the hidden diversification problems that can exist inside apparently well-balanced portfolios, including ETF overlap, concentration risk, sector dependency, geographic bias and correlated holdings that increase risk without investors realising it.