The valuation logic for the defense sector is undergoing a reassessment on Wall Street. Analysts and investors believe the rapid evolution of emerging technology fields like electronic warfare and autonomous systems is altering the growth models and profit outlooks of traditional defense contractors.

Recent reports indicate that electronic warfare is no longer merely a supplementary tool for traditional military operations but has become a core capability that can determine the outcome on the battlefield. This shift is driving the market to reprice defense firms, especially against a backdrop where growth in traditional platform manufacturing is leveling off. The current market focus is increasingly on companies that hold competitive advantages in software-defined systems, AI-assisted decision-making, and electronic countermeasures.

Since the beginning of 2026, the U.S. stock market's defense sector has risen by approximately 15%, outperforming the broader market. Companies focused on electronic warfare, signals intelligence, and autonomous systems have seen particularly significant gains. Analysts point out that spending on electronic warfare is growing faster than procurement for traditional weapons platforms, with a projected compound annual growth rate of 8% to 10% for related budgets over the next five years. This trend is reshaping the industry's valuation framework, with the market beginning to assign a higher valuation premium to technology-driven defense enterprises.

Furthermore, the aerospace and defense mergers and acquisitions market is also being impacted by this trend. Major defense contractors are actively acquiring small and medium-sized technology firms with electronic warfare and AI software capabilities to compensate for shortcomings in internal research and development. A recent example is Lockheed Martin's $3.45 billion acquisition of Ultra Maritime, a deal driven by the latter's core capabilities in naval electronic warfare and anti-submarine technology.

Executives from defense companies state that, compared to traditional platform manufacturing, electronic warfare and software-defined systems offer higher profit margins and shorter product cycles, making them a better fit for high-growth investment logic. This perspective is gradually changing the market's traditional perception of defense contractors, prompting investors to shift their focus from singular metrics like order books and delivery volumes to a greater emphasis on a company's technological moat and the proportion of revenue derived from software.

Looking ahead, as the nature of military conflict continues to evolve, investment in the electronic warfare domain is expected to increase further. Analysts believe defense companies possessing core electronic warfare technologies and AI software capabilities are poised to capture a larger share of the next defense budget cycle. This trend is likely to influence not only individual stock valuations but could also elevate the overall valuation benchmark for the entire defense sector.