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iShares Russell 2000 ETF vs State Street SPDR S&P 500 ETF Trust

Over the past year IWM returned +14.3% and SPY returned +10.8%; their daily moves had a correlation of 0.83.

IWM +14.3% SPY +10.8%Growth of $1, one year, split-adjusted
MetricIWMSPY
Price$278.44$757.12
Market cap$77.34B$803.25B
Today−1.64%−0.35%
1 month+2.6%−1.6%
6 months−2.1%+1.2%
Year to date+13.1%+11.0%
1 year+14.0%+10.9%
Revenue growth (YoY)——
Gross margin——
Net margin——
P/E (TTM)——
Price / sales——
Net cash——
Dividend yield1.08%1.00%
Volatility (60d)18.1%14.9%
Short % of float——
Next earnings——

Shading marks the stronger figure where one clearly exists (lower is better for valuation and volatility).