iShares vs. Invesco: Which Aerospace ETF Is Best for Your Portfolio in 2026?

iShares U.S. Aerospace & Defense ETF (ITA) charges a lower expense ratio than Invesco Aerospace & Defense ETF (PPA) at 0.38% vs. 0.58%, but PPA has delivered stronger five-year growth of $2,327 on $1,000 versus $2,205 for ITA. ITA outperformed over the past 12 months with a 30% return versus 25.4% for PPA, while also carrying greater concentration risk with its top three holdings making up nearly half the portfolio. The piece is a comparative ETF review rather than a catalyst-driven event, so market impact should be limited.

Analysis

The real signal here is not “which ETF is cheaper,” but which part of the defense stack investors are being forced to own. The more concentrated vehicle is effectively a levered proxy on a handful of primes whose earnings are increasingly driven by multi-year backlog conversion, not near-term macro beta; that means it should outperform when the market is paying up for visibility and cash return durability, but it can also de-rate sharply if one program hiccups or delivery timing slips. The broader fund dilutes single-name risk but also lowers torque to any one procurement cycle, so it is the more defensive expression if budgets become noisier.

The second-order winner is the industrial supply chain behind the primes: avionics, components, maintenance, and defense software names that sit outside the top three ETF holdings can keep compounding even when headline index returns flatten. If capital rotates out of concentrated ETF exposure, liquidity will likely migrate toward the names with cleaner execution and better buyback capacity, not necessarily the most obvious platform contractors. That favors a barbell approach: own the secular beneficiaries of elevated defense spending, but avoid paying index-level fees for exposure that is already highly concentrated in a few mega-cap contractors.

From a risk perspective, the key reversal catalyst is any sign that order books stop translating into revenue recognition at the expected pace. Over the next 1-2 quarters, watch for delivery delays, margin pressure from fixed-price contracts, or budget noise that compresses sentiment before fundamentals roll over. Over a 12-24 month horizon, the biggest threat is that current enthusiasm has already pulled forward multiple expansion, making the ETFs more vulnerable to a “good news, no upside” regime than to an outright earnings collapse.

Key Decisions for Investors

• Prefer a basket of single-name primes over the concentrated ETF wrapper: long GE / RTX on a 6-12 month horizon versus owning the ETF, to capture operating leverage while avoiding fund-level concentration drag; use a 10-15% trailing stop because the trade is more execution-sensitive than index-like exposure.
• For investors needing sector beta, choose the lower-fee vehicle only as a tactical 3-6 month trade on continued defense sentiment; avoid using it as a long-term hold unless you accept high single-name concentration risk and the possibility of sudden multiple compression.
• Pair trade: long GE / short the more concentrated ETF exposure if GE execution remains stable and the market continues to reward cash-return visibility; this expresses belief in the winner without paying for the whole concentrated basket.
• If defense spending headlines accelerate, buy 3-6 month call spreads on RTX rather than outright ETF exposure; asymmetric payoff is better because the upside is likely to come from multiple expansion in one or two names, not broad basket rerating.
• Fade crowded enthusiasm with a staggered entry: wait for a 5-8% pullback in the sector before adding exposure, since the near-term risk/reward is more about sentiment reset than fundamental deterioration.