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Index Fund

An index fund aims to match the performance of a market index instead of trying to beat it.

Why this matters

Index funds are a common beginner choice because they are simple, diversified, and often low cost.

Simple example

An S&P 500 index fund owns stocks that mirror the S&P 500 index.

Common mistakes

  • Assuming all index funds have the same fees and tracking quality.
  • Ignoring what index the fund actually follows.
  • Treating index investing as risk-free.

Related terms