KEY POINTS
- Global X Defense Tech ETF (SHLD) has returned 47.82% year-to-date, while SPDR S&P Aerospace & Defense ETF (XAR) posted 69% over the trailing 12 months, making defense the best-performing thematic sector of 2026.
- Global defense spending hit $2.63 trillion in 2025 with all NATO allies meeting the 2% GDP target for the first time, and 2026 commitments have escalated further to a 5% GDP aspiration.
- Thematic ETFs saw $5.3 billion in net inflows in March, with defense and infrastructure funds leading; watch for Q2 budget allocation data from European governments as the next catalyst.
Defense ETFs are the runaway winners of 2026's thematic rotation, and the numbers are not close. The Global X Defense Tech ETF (SHLD) has returned 47.82% year-to-date through April 28, the Invesco Aerospace & Defense ETF (PPA) is up 37.8%, and the SPDR S&P Aerospace & Defense ETF (XAR) has delivered 69% over the trailing twelve months. For context, the S&P 500 has gained 4.7% this year.
What's Driving the Flows
The demand story is straightforward: governments are spending at a pace not seen since the Cold War. Global defense expenditure hit $2.63 trillion in 2025, and for the first time in NATO's history, all member nations met the 2% of GDP spending commitment. European nations increased their defense budgets by 20% year-over-year, a response to the ongoing conflict architecture in Eastern Europe and the Middle East. The alliance's aspirational target has now shifted to 5% of GDP, a figure that would represent the most dramatic military buildup in Western history if achieved.
In the United States, the Trump administration's proposed defense spending boost and Congressional munitions restocking requests have added another layer of demand. Combined U.S. and allied spending creates a multi-year procurement cycle that benefits defense contractors across the supply chain, from prime contractors like Lockheed Martin and RTX to smaller component manufacturers and defense technology startups.
Thematic ETFs as a category pulled in $5.3 billion in net inflows in March, with defense and infrastructure funds leading the charge. The shift is notable because it represents capital leaving traditional growth and technology exposures — information technology ETFs saw $3 billion in outflows the same month — and rotating into sectors with government-backed revenue visibility.
Picking the Right Fund
The three major defense ETFs differ meaningfully in construction, and those differences matter for returns. SHLD, managed by Global X, deliberately blends U.S. defense giants with international companies positioned to capture European rearmament spending. Its $8.6 billion asset base and 47.82% year-to-date return reflect the premium the market places on exposure to the NATO spending wave beyond American borders.
XAR takes an equal-weight approach across the U.S. aerospace and defense supply chain, which gives smaller companies the same portfolio impact as Lockheed Martin or Northrop Grumman. That construction has driven the strongest returns among the three funds over the past 12 months, as mid-cap defense firms have outperformed their large-cap peers on faster revenue growth rates.
ITA, the iShares U.S. Aerospace & Defense ETF, is the largest fund at $16 billion in assets and takes a market-cap-weighted approach that concentrates roughly 40% of the portfolio in its top five holdings. It is the most liquid option and the default choice for institutional allocators who need to move large positions without impacting price.
The Overlooked Play
One fund that has flown under the radar deserves mention. The Breakwave Tanker Shipping ETF (BWET) has surged more than 600% year-to-date, driven by the disruption of maritime shipping routes through the Strait of Hormuz and other conflict-affected waterways. While not a pure defense play, BWET captures the economic spillover of the same geopolitical tensions that are driving defense ETF demand. It is a reminder that in a world where 9.1 million barrels per day of crude oil production are shut in, the second-order effects of conflict can be even more profitable than the first-order defense bets.
What Could Derail the Trade
The risk to defense ETFs is a genuine peace breakthrough. If U.S.-Iran negotiations produce a credible framework for reopening the Strait of Hormuz, or if the Eastern European conflict reaches a ceasefire, the geopolitical premium built into these funds could unwind quickly. However, even in a peace scenario, the structural increase in defense budgets — codified in legislation across multiple NATO governments — would take years to reverse. The spending commitments are contractual, not discretionary. For traders, the next catalyst is Q2 budget allocation data from European governments, expected in late May, which will reveal whether the 2026 spending pledges are translating into actual procurement orders.
