IXUS tracks the MSCI ACWI ex USA IMI Index, which holds thousands of companies of all sizes across developed and emerging markets outside the United States, weighted by market capitalization. Europe, Japan and emerging markets such as China, India and Taiwan make up the largest regional weights, and Canada is also included. Currency exposure is not hedged, so changes in foreign currencies against the US dollar affect returns. IXUS is similar to VXUS, which tracks a FTSE index.