Glossary term
Russell 2000
The Russell 2000 is a widely followed U.S. small-cap stock index that tracks roughly 2,000 smaller companies within the broader Russell 3000 universe.
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What Is the Russell 2000?
The Russell 2000 is a widely followed U.S. small-cap stock index that tracks roughly 2,000 smaller companies within the broader Russell 3000 universe. Investors often use it as a benchmark for small-cap U.S. stocks.
The index is commonly referenced in market commentary, ETF and mutual fund benchmarks, asset allocation models, and performance comparisons between small companies and large companies.
Key Takeaways
- The Russell 2000 is one of the most common benchmarks for U.S. small-cap stocks.
- It represents smaller companies within the broader Russell 3000 index family.
- Small-cap stocks can offer growth potential but may be more volatile and less liquid than large-cap stocks.
- The index can have different sector exposure than large-cap indexes such as the S&P 500.
- Investors often access Russell 2000 exposure through index funds and ETFs.
How the Russell 2000 Works
The Russell 2000 is constructed from the smaller end of the Russell 3000 index universe. Because it is market-cap weighted, larger companies inside the small-cap universe generally have more influence than the smallest companies in the index.
The index is reconstituted periodically based on published rules. That process updates which companies qualify for the small-cap universe as market values change.
Russell 2000 Versus Large-Cap Indexes
Benchmark type | Typical exposure |
|---|---|
Russell 2000 | Small-cap U.S. stocks |
Russell 1000 | Large-cap and mid-cap U.S. stocks |
S&P 500 | Large U.S. companies selected by index methodology |
Why Investors Watch It
The Russell 2000 can give clues about risk appetite, domestic economic sensitivity, and how smaller companies are performing relative to larger companies. Small-cap companies may be more exposed to financing costs, labor costs, credit conditions, and U.S. demand.
That does not mean the index is automatically better or worse than large-cap exposure. It simply represents a different slice of the market.
The Bottom Line
The Russell 2000 is a leading U.S. small-cap stock benchmark. It can help investors measure small-company performance, but small-cap exposure usually brings more volatility, liquidity risk, and business-specific risk than broad large-cap indexes.