What Are Aerospace & Defense ETFs?
Aerospace and defense ETFs hold stocks of companies that design, manufacture, and service military equipment, commercial aircraft, space technology, and defense electronics. This specialized sector includes some of America's most iconic industrial companies — Lockheed Martin, Boeing, RTX (Raytheon), Northrop Grumman, and General Dynamics.
Defense spending is driven by government budgets and geopolitical conditions, giving aerospace and defense ETFs a unique return driver that is largely independent of the consumer economy. When geopolitical tensions rise, defense budgets typically increase, benefiting the entire sector regardless of what is happening in the broader economy.
These ETFs also capture commercial aerospace exposure through companies like Boeing and its suppliers. The commercial aviation cycle adds another dimension of returns tied to airline demand, aircraft replacement cycles, and global travel growth.
Top Aerospace & Defense ETFs
ITA — iShares U.S. Aerospace & Defense ETF
ITA is the most popular aerospace and defense ETF, holding about 35 stocks at 0.40%. It is cap-weighted, meaning the largest defense contractors dominate. RTX, Boeing, and Lockheed Martin typically represent over 30% of the fund. ITA provides concentrated exposure to the major prime contractors.
PPA — Invesco Aerospace & Defense ETF
PPA offers broader coverage with about 55 holdings at 0.58%. It includes more mid-cap defense companies and suppliers that ITA may underweight. PPA's broader scope captures more of the defense supply chain, including companies making components, electronics, and specialized materials.
XAR — SPDR S&P Aerospace & Defense ETF
XAR uses a modified equal-weight approach with about 35 holdings. This gives mid-cap defense companies much more influence than in cap-weighted ITA. XAR can outperform when smaller defense firms rally, but it concentrates less in the proven prime contractors that win the largest government contracts.
Government Spending: The Primary Catalyst
U.S. defense spending exceeds $800 billion annually, making the Department of Defense the world's largest employer and purchaser. Defense ETFs are essentially bets on the trajectory of this spending. When budgets grow, defense contractors see more orders, higher revenue, and expanding profit margins.
Several factors drive defense budget growth: geopolitical tensions (the Russia-Ukraine conflict prompted NATO countries to increase spending commitments), technological competition with China, aging equipment requiring replacement, and bipartisan political support for national security spending. Defense budgets rarely shrink significantly even during periods of fiscal austerity.
This government-backed demand provides a floor under defense company revenue that few other sectors enjoy. Even during the 2008 financial crisis, defense budgets remained relatively stable, insulating defense stocks from the worst of the economic downturn.
Commercial Aerospace: The Growth Engine
Aerospace and defense ETFs also include significant commercial aviation exposure. Boeing, a major holding in ITA and PPA, derives substantial revenue from commercial aircraft sales. Suppliers like General Electric Aerospace, Howmet Aerospace, and TransDigm also serve the commercial aviation market.
Commercial aerospace follows a long cycle driven by aircraft replacement needs and global passenger traffic growth. Global air travel typically grows 4-5% annually over long periods, driving steady demand for new aircraft. The current replacement cycle, as airlines retire older fuel-inefficient planes, provides a multi-year tailwind for commercial aerospace companies.
However, commercial aerospace can be volatile — the COVID-19 pandemic devastated air travel and Boeing's 737 MAX issues created company-specific turbulence. Defense-focused companies provide more stability, which is why diversified aerospace and defense ETFs include both segments.
Dividends and Shareholder Returns
Major defense contractors are reliable dividend payers. Lockheed Martin, RTX, Northrop Grumman, and General Dynamics all have long histories of increasing dividends. Defense company cash flows are unusually predictable because multi-year government contracts provide revenue visibility that few industries can match.
ITA typically yields 1-2%, below what dedicated income ETFs offer but above the growth sector average. Beyond dividends, defense companies return substantial cash through share buybacks, which can boost earnings per share and stock prices even when revenue growth is modest.
For income investors, defense ETFs provide moderate current income with a stability profile that complements more volatile income sources. The predictability of government contract revenue makes defense dividends among the safest in the equity market.
How to Use Aerospace & Defense ETFs
Aerospace and defense ETFs work as thematic positions within a broader portfolio. A typical allocation of 3-5% provides meaningful defense exposure without over-concentrating in a single sector. These ETFs offer portfolio diversification because defense spending has a low correlation with consumer spending and the broader economic cycle.
The sector tends to outperform during periods of geopolitical tension and increased government spending. It may lag during periods of peace and fiscal austerity, though significant defense spending cuts are rare. For investors with a long-term view on global security needs, aerospace and defense ETFs provide exposure to a durable growth theme. Compare options on our ETF screener.
