Defence rally fades despite Iran risk

U. S. defence shares have failed to sustain the geopolitical bounce that often accompanies armed conflict, with the sector sliding in March even as tensions around Iran intensified. The NYSE Arca Defense Index, which tracks 34 large and small-cap companies, fell nearly 8% during the month, a steeper decline than the S&P 500’s roughly 5% drop, underscoring how investors have become more cautious about paying up for war-linked expectations.

That retreat marks a contrast with the pattern seen after Russia’s full-scale invasion of Ukraine in 2022, when major defence contractors enjoyed a more durable re-rating on expectations of higher orders, faster replenishment demand and broader NATO rearmament. This time, the market appears to have moved quickly from an early burst of enthusiasm to a more measured assessment of what conflict in the Middle East can actually deliver to earnings in the near term.

Analysts tracking the sector say the earlier rise had been driven less by immediate changes to company fundamentals than by anticipation of a larger U. S. military role and hopes of stronger budget commitments. Those hopes were amplified by discussion around a proposed $1.5 trillion U. S. defence budget for fiscal 2027. But investors have since had to weigh a more complicated picture, including long production cycles, supply-chain bottlenecks, labour constraints and the fact that many large contractors already trade at valuations that assume a sizeable pipeline of future orders.

The market’s response also suggests that geopolitical shock alone is no longer enough to lift the whole sector. Defence manufacturers can benefit when the Pentagon needs to replenish missiles, munitions and other equipment, but the financial effect is often delayed. Contracts take time to negotiate, appropriations must pass through Congress, and revenue recognition can stretch over several quarters or years. For portfolio managers facing broad equity weakness and heightened volatility, that timeline has made some stocks look less like an immediate hedge and more like a long-duration policy trade.

The backdrop on Wall Street has reinforced that caution. Broader markets were rattled by shifting signals on the Iran conflict, with oil prices jumping sharply after President Donald Trump warned of harder action against Tehran. Brent crude rose above $107 a barrel and at points approached $110, while U. S. crude also surged, reviving concerns about inflation and growth rather than triggering a clean rotation into defence names. Investors instead moved through a wider risk-off cycle that hit equities across sectors, even as some contractors posted modest day-to-day gains.

That helps explain why even companies seen as likely beneficiaries of replenishment demand have not enjoyed a uniform lift. Reuters reported that earnings expectations for some of the biggest groups, including Lockheed Martin and Northrop Grumman, had edged lower. At the same time, selective bullishness has survived. Barron’s reported that Melius Research upgraded RTX, arguing that missile demand and replenishment needs could support higher margins and fresh contracts, while also lifting price targets on several peers. The split in analyst views points to a market that is distinguishing between specific product lines and the broader sector narrative.

There are also structural reasons the sector’s reaction has been uneven. Missile makers and electronics suppliers tied directly to precision munitions, propulsion systems and air defence may benefit faster than diversified primes whose order books were already full before the latest Middle East escalation. Investors are also assessing whether Washington will prioritise faster production and industrial capacity over shareholder-friendly measures such as buybacks and margin expansion. That policy emphasis, if sustained, could support long-term output while limiting the kind of short-term earnings surprise that often drives sharp stock gains.