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

ITA charges a lower 0.38% expense ratio than PPA's 0.58% but is more concentrated, with GE Aerospace, RTX, and Boeing making up nearly half the portfolio. Over the past 12 months, ITA outperformed with a 30% return versus 25.4% for PPA, while PPA leads over five years with $2,327 growth on $1,000 versus $2,205 for ITA. The article is largely comparative and opinion-based, suggesting ITA for lower costs and PPA for a broader defense-industrials mix.

Analysis

The key signal is not simply “cheaper ETF vs better performance,” but that defense exposure is becoming increasingly a proxy for a handful of prime contractors with different risk profiles. The more concentrated vehicle effectively makes GE, RTX, and BA the real trade; that helps in a bid-led tape but creates hidden single-stock beta, especially if one program slips or earnings are disappointed. In contrast, the broader fund dilutes idiosyncratic risk and should hold up better if the market starts rewarding backlog visibility and government-spend optionality over pure momentum.

The second-order issue is that defense ETF flows can amplify moves in the underlying names without improving fundamentals. If retail and benchmark-driven capital continues to favor the lower-fee product, the top holdings can experience persistent mechanical demand, widening valuation dispersion versus adjacent industrials and suppliers. That is particularly relevant for BA, which still carries execution fragility; a lower weight in the broader fund may make it the cleaner expression for investors who want a cyclical recovery without overexposure to one operational turnaround.

From a timing perspective, the risk window is months, not days. Near-term upside likely persists as long as geopolitical headlines and budget negotiations keep the sector in favor, but the setup is vulnerable if defense spending rhetoric fails to translate into awards, or if rates rise enough to re-rate long-duration industrial cash flows. A subtle contrarian point: the expensive fund may actually be the better diversifier because its lower concentration reduces the chance that one headline reverses the whole trade.

The consensus seems to be treating this as a simple cost-versus-return choice, but the bigger question is whether investors want index-like defense exposure or a leveraged bet on three stocks. Given the concentration, the cheaper ETF is not necessarily the safer one; it is the more aggressive one in disguise. If the sector rotates from momentum to fundamentals, the broader basket should outperform on drawdown control even if it lags in a straight-line rally.

Key Decisions for Investors

• Prefer the broader defense basket over the concentrated one for new allocation: use a 3-6 month horizon and size for lower idiosyncratic risk rather than maximum beta capture.
• Long RTX / short BA as a relative-value expression on defense exposure: RTX offers cleaner program visibility and lower execution risk, while BA remains the most vulnerable to headline-driven de-ratings over the next 1-2 quarters.
• If looking for sector participation, avoid chasing the concentrated ETF after a strong 1-year run; wait for a 5-8% pullback in the top holdings or a pause in fund-flow momentum before initiating.
• For income-oriented accounts, prefer direct exposure to the stronger compounders in the basket over the ETF wrapper, since the fee drag is material relative to the modest yield pickup.