This ETF offers exposure to the global health care sector, a corner of the world economy that can exhibit low volatility and bring some degree of stability to a portfolio. The underlying portfolio is spread across U.S. stocks and ex-U.S. developed markets; emerging economies are nowhere to be found in this fund. It should be noted that IXJ has a heavy tilt towards domestic securities; those seeking a bigger allocation to international companies may prefer IRY. Given the sector-specific nature of this fund, IXJ probably shouldn't be included in a long-term, buy-and-hold portfolio; it is more useful for those looking to implement a tactical tilt towards health care or to pursue a sector rotation strategy. Though IXJ includes more than a dozen individual economies and close to 100 individual stocks, a relatively small handful account for a relatively large portion of the total portfolio--leaving something to be desired in terms of diversification.