Front Running S&P 500 ETF Rebalances Could Be Adding to Tracking Errors

Some savvy traders have taken advantage of scheduled rebalancing in popular exchange traded funds to front run potential changes, adding to wider divergence between S&P 500 ETF plays. Year-to-date, the SPDR S&P 500 ETF (NYSEArca: SPY) rose 2.15%, iShares Core S&P 500 ETF (NYSEArca: IVV)...