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What is the Russell 2000 index, and how does it compare to the S&P 500 and Nasdaq 100?

The index holds 2,000 smaller companies and is reconstituted twice a year, giving investors a broader gauge of U.S. small-cap performance.

  • The Russell 2000 index tracked 2,000 small-cap U.S. companies with a median market capitalization of $1.06 billion as of September 30, 2026, serving as a primary barometer for small-cap stock performance.
  • Smaller companies within the index frequently exhibit greater volatility than their large-cap counterparts, often lacking the scale of major corporations like Apple and relying heavily on domestic economic conditions.
  • To maintain its small-cap focus, the index undergoes rule-based reconstitution twice annually in June and December, removing companies that outgrow the market capitalization threshold and ensuring representation of the small-cap universe.
  • Unlike the price-weighted Dow Jones Industrial Average or the large-cap S&P 500, the index is less top-heavy and offers broader diversification across its 2,000 constituents, mitigating concentration risk.
  • Traders access the index through various futures contracts, including Russell 2000 futures and Micro E-mini Russell 2000 , which facilitate exposure to these smaller-cap stocks.
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What is the Russell 2000 index, and how does it compare to the S&P 500 and Nasdaq 100?

NinjaTrader reports the Russell 2000 Index tracks about 2,000 small-cap U.S. companies, serving as a benchmark for smaller domestic businesses versus large-caps.

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The Motley Fool broke the news in Alexandria, United States on Tuesday, October 13, 2026.
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