IYY Vs. IWB: Fast Facts On Two Top 1000 ETFs

  • IYY and IWB are very similar ETFs holding about 1,000 of the largest US-traded companies weighted based on float-adjusted market capitalization. The differences in underlying indexes definition and rebalancing make no significant difference in portfolio composition and historical performance. IWB offers tighter bid-ask spreads and higher trading volumes, making it more attractive for active traders.