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Russell 2000 Index (RUT)

A stock market index that tracks the performance of approximately 2,000 small-capitalization U.S. companies. It is widely used as a benchmark for small-cap stocks and an indicator of domestic economic health.

Example

When the Russell 2000 outperforms the S&P 500, it often signals broad economic optimism since small-cap companies are more sensitive to domestic growth conditions than multinational large-caps.