Russell 2000

The Russell 2000 is a benchmark of roughly 2,000 small U.S. companies, the standard small-cap gauge.

A quick example

Picture this

After a recession, the economy begins to recover and the Russell 2000 surges 25% while the S&P 500 gains 10%. Small companies, leaner and more domestically focused, bounce harder off the bottom. A few years later, investors flee risk and the Russell 2000 falls twice as much as the S&P. The scenario is the small-cap pattern: more upside in recoveries, more pain in retreats, and periods of multi-year lag that test patience between the cycles.

What it means for you

It captures the riskier, more domestic, faster-growing end of the market.

How to apply it

Use a small-cap fund to add a different risk profile to a portfolio, but expect bigger swings and periods of prolonged underperformance versus large caps. Small-cap exposure belongs in the risk-tolerant portion of a portfolio.

Common mix-ups

Small caps lag in risk-off periods and lead in recoveries, often sharply.

Key takeaway

The Russell 2000 is the small-cap gauge, capturing roughly 2,000 of the smallest listed U.S. companies with all their volatility and domestic focus. Small caps lead in recoveries and lag in risk-off periods, and the swings can be sharp in both directions. A small-cap fund adds a different risk profile to a portfolio, not a smoother one, so size it for the risk-tolerant portion of your plan. The index is a segment tool, not a market proxy.

Definitions reviewed by the Investing Glossary editorial team.