iShares Russell 2000 ETF (IWM) Price Today — Live Chart and Analysis

IWM is seen as a key indicator of the U.S. domestic economy's health because small-cap companies derive most of their revenue from within the U.S.

IWM tracks small-cap stocks, which are generally more volatile and domestically focused. SPY tracks large-cap stocks, which are often more stable, global corporations.

IWM trades on U.S. stock exchanges during regular market hours and has a very active options market.

Yes, small caps are typically riskier than large caps due to higher volatility and sensitivity to economic downturns, but they also offer greater potential for growth.