Vince (Qijun) Chen

Vince (Qijun) Chen, CFA, is the founder of PortfolioFuture, an investment research platform focused on ETF and mutual fund alternatives, fund replication and empirical portfolio research. PortfolioFuture is a data-driven investment research platform for ETFs and mutual funds. Its research focuses on fund alternatives, return similarity, fund replication and out-of-sample validation.

Vince (Qijun) Chen
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When is one fund really a substitute for another?
OPINION NOV 10, 2026
When is one fund really a substitute for another?

Fund categories are a useful starting point – but they can hide meaningful differences.