Defence Stocks Surge on US-Iran Tensions: What Investors Should Know

Defence Stocks Gain as Geopolitical Tensions Rise

The escalating conflict between the US, Israel, and Iran has triggered a significant rally in defence stocks across global markets. As hostilities entered their third week, investors repositioned portfolios towards industries linked to national security, anticipating a sharp rise in military spending. This renewed interest has revived momentum in both American and Indian defence companies, which had seen a sharp correction in late 2025.

US Defence Giants See Billions in Gains

Since the conflict began on February 28, major American defence contractors have seen their market values surge. Lockheed Martin, the world's largest defence contractor, reached record highs as its THAAD and PAC-3 Patriot missile defence systems proved crucial in countering Iranian attacks. Similarly, RTX (formerly Raytheon) benefited from rising demand for its AMRAAM air-to-air missiles and Patriot radar systems. Northrop Grumman shares jumped 6% in a single session after its B-2 stealth bombers were reportedly deployed for precision strikes. The conflict has accelerated procurement timelines, with the Pentagon reportedly moving to quadruple production targets for certain interceptors. The growing role of data analytics in modern warfare also boosted companies like Palantir Technologies, whose stock rose approximately 17% this month as its AI platforms are used for battlefield intelligence.

Renewed Interest in Indian Defence Sector

The global rally has reignited investor interest in Indian defence companies. The Nifty India Defence Index, which had corrected significantly in late 2025, has started moving higher again, gaining nearly 3% in a recent session. Shares of Mazagon Dock Shipbuilders, Data Patterns (India), Garden Reach Shipbuilders & Engineers, and Cochin Shipyard recorded notable gains, rising as much as 9%. The sentiment was further bolstered by reports of a US submarine sinking an Iranian warship in the Indian Ocean, reinforcing expectations of increased global defence spending.

The 2025 Rally and Subsequent Correction

This recent uptick follows a period of extreme volatility. In 2025, the Nifty India Defence Index surged nearly 83% in just three months, from March to June, hitting a record high of 9,195. This extraordinary rally was fuelled by investor optimism after the Indian Armed Forces conducted targeted strikes against terrorist groups under 'Operation Sindoor'. However, analysts warned of stretched valuations, and the index subsequently corrected by about 21%, falling to around 7,000 by the end of 2025. Despite that pullback, persistent geopolitical tensions have provided underlying support for the sector, which has gained over 7% so far in 2026.

Structural Strength and Government Policy

Beyond the immediate conflict, analysts point to strong structural fundamentals supporting the Indian defence sector. The Union Budget for 2026 allocated approximately Rs 7.85 lakh crore towards defence, one of the largest military budgets globally. A significant portion of this is directed toward capital procurement and domestic manufacturing under the 'Atmanirbhar Bharat' (self-reliant India) initiative. This long-term policy support is expected to provide a steady stream of orders for domestic companies, particularly those in missile systems, radar technologies, and defence electronics like Bharat Electronics and Bharat Dynamics.

Valuations and Investor Strategy

While the outlook appears positive, experts caution against chasing momentum. Naren Agarwal, CEO of Wealth1, noted that many defence stocks have already seen a sharp re-rating over the past few years, and valuations in several companies have become elevated. Analysts advise that future stock performance may be more selective, driven by fresh order announcements, export growth, and the ability to execute existing contracts on time.

What Should Investors Do?

Financial advisors recommend a staggered and cautious investment approach. Instead of speculating on short-term geopolitical events, investors should focus on companies with strong balance sheets, proven execution capabilities, and clear, long-term order visibility. Harshal Dasani, Business Head at INVasset PMS, suggested that while the sector benefits from strong policy support, a prudent strategy would involve avoiding momentum-chasing and focusing on fundamental strengths. Periodic portfolio rebalancing remains a more durable strategy than attempting to time market swings based on conflict headlines.

Conclusion

The recent conflict has undoubtedly provided a near-term catalyst for defence stocks. However, the sector's long-term trajectory, particularly in India, will be shaped more by sustained government spending and the success of its domestic manufacturing push. For investors, the key is to look beyond the headlines and focus on the underlying financial health and order pipelines of individual companies, acknowledging that while the sector is structurally strong, valuations warrant a disciplined approach.