Portfolios
How to Check Your Funds for Hidden Overlap
Three index funds can still mean one giant bet on the same handful of mega-caps — overlap analysis reveals concentration no single fund page admits.
Portfolios
Building a coherent set of positions: fund overlap, correlation, position count, home bias, and a rebalancing schedule that survives a busy year.
Portfolios
How Many Stocks Does a Diversified Portfolio Need
Classic research says twenty to thirty names capture most diversification — and newer evidence on skewness argues for simply owning the whole index.