A look at the weighted underlying holdings of the Invesco S&P SmallCap Materials ETF (PSCM) shows an impressive 13.4% 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 » Rayonier Advanced Materials Inc (RYAM), which makes up 0.83% of the Invesco S&P SmallCap Materials ETF (PSCM), has seen 2 directors and officers purchase shares in the past six months, according to the recent Form 4 data.