iShares U.S. Aerospace & Defense ETF (ITA)

The iShares U.S. Aerospace & Defense ETF (ITA) is a passively managed exchange-traded fund that holds the major publicly traded companies supplying military aircraft, missile systems, and defence electronics to the U.S. Department of Defense and allied governments.

What does this fund actually own?

ITA holds roughly 40 to 60 large-cap and mid-cap aerospace and defence stocks selected from the Russell 1000 index. Its top holdings are the household names in the sector: Lockheed Martin, Raytheon Technologies, Boeing (for its defence division), Northrop Grumman, and General Dynamics. These are the primes — the giants that win billion-dollar contracts and then subcontract to thousands of smaller manufacturers and suppliers. Smaller holdings include component makers, avionics specialists, and electronics firms that feed supply chains. The fund is heavily concentrated in the United States; foreign defence contractors are not included unless they are U.S.-listed.

Who decides what goes in the fund?

ITA is based on the Dow Jones U.S. Select Aerospace & Defense Index, which is constructed and maintained by S&P Dow Jones Indices. The index methodology is transparent and rules-based: companies qualify if they derive a meaningful portion of revenue from aerospace or defence work, have sufficient size (typically above 500 million in market capitalization), and meet liquidity standards. Once a company qualifies, it stays in until it no longer meets the criteria — usually because it merges, goes private, or shifts away from defence revenue. The fund trustees at BlackRock (the iShares issuer) rebalance holdings quarterly and make no discretionary bets.

Why does this sector move together?

Aerospace and defence stocks are correlated because they all depend on the same primary customer: the U.S. federal government. Budget cycles, geopolitical tensions, and shifts in military doctrine affect the entire sector at once. A major contract win by one competitor may not harm another (the budget pie can grow), but cuts to overall defence spending ripple across every company. Foreign policy — tensions with China or Russia, Middle East conflicts, NATO commitments — shapes demand. Technology cycles matter too: a shift from manned to unmanned aircraft, or from traditional missiles to hypersonic weapons, reallocates spending across the player base.

What does it cost, and how liquid is it?

ITA has a low expense ratio (typically 0.4% to 0.5% annually), reflecting the passive index approach and BlackRock’s scale. It trades on NYSE with substantial volume, so bid-ask spreads are tight and large positions can be entered or exited without moving the price much. The fund’s size — billions of dollars in assets — ensures steady liquidity. Dividends are modest; the sector is capital-intensive and reinvests heavily rather than paying out cash to shareholders.

What are the real risks?

The sector is cyclical. Defence budgets respond to geopolitical conditions and domestic political priorities, which are unpredictable. A major swing toward fiscal retrenchment, or a period of relative peace, can weigh on the entire sector for years. Companies are also heavily dependent on government contracts, which are competitive, often delayed, and subject to political interference and audit. Supply-chain disruptions — especially semiconductor shortages or issues sourcing rare materials — hit defence primes hard because they cannot easily flex production.

Concentration risk is real. The fund is dominated by a handful of mega-cap primes; the top five holdings often account for 60% of the fund’s assets. If Lockheed Martin or Raytheon stumbles, the fund stumbles with it. There is also regulatory risk: defence contractors face strict compliance rules, export controls, and potential investigation for cost overruns or accounting irregularities. Environmental and labour issues increasingly scrutinize defence suppliers.

Who is this fund for?

ITA suits investors who believe defence spending will grow over the long term — either because of geopolitical tensions or because the U.S. political consensus supports military strength. It is a thematic bet, not a hedge. Investors in cyclical sectors or those with strong convictions about military-industrial spending sometimes use it as a core position or satellite holding. It is not suitable for anyone with ethical objections to defence contracting.

How to research the fund

Start with the fund’s fact sheet on BlackRock’s iShares website, which lists holdings, sector breakdown, and historical performance. Read the underlying index methodology from S&P Dow Jones Indices for transparency on construction rules. Then study a few of the major holdings — Lockheed Martin and Raytheon Technologies file detailed 10-K reports with valuable colour on contract backlogs, pricing trends, and competitive dynamics. Defence industry analyst reports from Barclays, Bank of America, or Goldman Sachs frame sectoral trends well. Finally, monitor defence-spending legislation and geopolitical reporting; these drive the sector more than earnings surprises do.