The SPDR S&P Aerospace & Defense ETF (NYSEARCA:XAR) is a strong aerospace and defense ETF with some intriguing top holdings in its portfolio. I’m bullish on the $2.1 billion ETF from State Street (NYSE:STT) based on a macro situation where conflict is escalating globally, leading more countries to invest in defense and its intriguing group of top holdings, like AeroVironment (NASDAQ:AVAV), which are thus reporting surging demand and a growing backlog. What Is the XAR ETF’s Strategy? According to