XAR: Still The Best Aerospace & Defense ETF By: TalkMarkets September 16, 2019 at 11:25 AM EDT XAR carries the lowest expense ratio of all these ETFs – although we are talking a range of only 0.35% for XAR and 0.59% for PPA. Read More >> Related Stocks: Aerospace & Defense Invesco ETF Aerospace Defense Bull 3X ETF Direxion Boeing Co Elbit Systems Ltd Lockheed Martin Northrop Grumman Raytheon Co S&P Aerospace & Defense SPDR US Aerospace & Defense Ishares ETF United Technologies