US Defense Investment Gap Caused by Market Barriers, Not Capital Shortage, Report Finds

The United States possesses sufficient capital for defense needs, but systemic risks hinder the replenishment of stockpiles and the adoption of disruptive technologies due to a lack of investable opportunities, according to a new analysis by Bain & Company and the Aerospace Industries Association (AIA). The report, "The State of Investment in Defense: Unlocking Growth," identifies that market conditions are preventing capital from flowing to critical bottlenecks within the industrial base.

While private investor interest in defense has surged, the Bain/AIA study highlights persistent barriers constraining investment in U.S. defense research and development, production capacity, critical inputs, component manufacturing, and emerging technologies. Findings drawn from stakeholder interviews indicate that existing investment and business models are insufficient for the current environment. "Private defense investment growth of all kinds is required to address capacity and innovation constraints that are risks to national security," stated Michael Sion, a partner at Bain & Company's Aerospace and Defense practice.

The report notes that the market capitalization of publicly traded U.S. aerospace and defense companies has nearly doubled since 2019, and defense-related venture capital has grown tenfold. However, large public defense contractors are trading at valuation multiples similar to utility companies, signaling that investors continue to price the sector for low risk and capped returns rather than growth. This profile makes it challenging to secure the upfront capital investment needed to expand production capacity for munitions and other high-demand systems.

Eric Fanning, President and CEO of the AIA, emphasized that while the U.S. has the capital, technology, and industrial expertise, ensuring long-term, stable public and private investment requires a more predictable environment. "Closing the gap between risk and return for investments in critical inputs, technology transition, and new production capacity is what turns today's momentum into real capability," added Sion.

The challenges are compounded by a difficult macroeconomic backdrop, including inflation and high interest rates alongside low profit margins, making the market for new private investment more uncertain than aggregate figures suggest. Private equity firms have largely remained on the sidelines for defense-focused businesses.