The Invesco Aerospace & Defense ETF (PPA) is a lower-cost option with a diversified focus on established defense companies, while the newer Tema Space Innovators ETF (NASA) targets high-growth opportunities in the space economy but comes with a higher expense ratio. Investors may prefer PPA for its stability and track record, whereas NASA may appeal to those seeking exposure to the emerging space sector, albeit with higher volatility.
For an investor focusing on cost-effectiveness and stability in the aerospace and defense sector, the Invesco Aerospace & Defense ETF (PPA) is a more attractive option due to its lower expense ratio of 0.58%, broader diversification with 61 holdings, and a stable historical performance with compounded annual returns of 13.6% since 2005. This ETF offers a more mature and diversified exposure compared to the newer, higher-risk Tema Space Innovators ETF (NASA), which is aimed at the high-growth but volatile space economy.