A look at the weighted underlying holdings of the FTSE RAFI US 1500 Small-Mid Portfolio (PRFZ) shows an impressive 11.6% 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 Northstar Realty Finance Corp (NRF), which makes up 0.17% of the FTSE RAFI US 1500 Small-Mid Portfolio (PRFZ), has seen 2 directors and officers purchase shares in the past six months, according to the recent Form 4 data.