A look at the weighted underlying holdings of the SPDR SSGA US Small Cap Low Volatility Index ETF (SMLV) shows an impressive 13.0% of holdings on a weighted basis have experienced insider buying within the past six months. Start slideshow:10 ETFs With Stocks That Insiders Are Buying » Brookline Bancorp Inc (BRKL), which makes up 0.60% of the SPDR SSGA US Small Cap Low Volatility Index ETF (SMLV), has seen 2 directors and officers purchase shares in the past six months, according to the recent Form 4 data.