State Street SPDR S&P Aerospace & Defense ETF(AMEX:XAR)

XAR takes a different approach to its target than other similar funds. It holds a portfolio of aerospace and defense stocks, as defined by GICS also and aims to achieve a 40/40/20 weighting among large-, mid, and small-caps respectively. The fund will generally invest substantially all, but at least 80%, of its total assets in the securities comprising the underlying index. It also tends to reach outside our definition of the segment into other sectors. As a result, it delivers diversified exposure.