Geopolitical tensions are flaring up across the globe, consistently drawing investor capital towards the defense and security sector. However, as stock prices hit new highs driven by successive events, historical valuation metrics are sounding a clear warning: shares of major U.S. defense contractors may be entering overheated territory.
Last week, a U.S. special forces operation in Venezuela prompted single-day stock gains of 2% to 3.5% for several defense companies, including Lockheed Martin (LMT) and General Dynamics (GD). Adding further fuel to the rally, President Donald Trump’s recent social media post suggesting the 2027 military budget should reach $1.5 trillion spurred significant after-hours buying. L3Harris Technologies (LHX) jumped 6.5%, while Northrop Grumman (NOC) climbed 5.4%.
With the war grinding on in Ukraine, tensions simmering in East Asia, and conflict spreading across the Middle East, a pervasive atmosphere of global instability has taken hold. Investors are placing straightforward bets: a turbulent world necessitates higher defense spending by governments, making defense stocks a logical investment.
Amid the market enthusiasm, a critical question is being overshadowed: have these stocks simply become too expensive?
An analysis of nearly two decades of data (2004-2023) shows that the average enterprise-value-to-sales (EV/S) ratio for ten major U.S. defense firms has historically hovered around 1.4x. This can be viewed as a long-term valuation benchmark for the sector. The current market picture, however, tells a different story.
Valuations are broadly elevated. With few exceptions, the current EV/S and price-to-sales (P/S) ratios for leading defense primes stand significantly above their 20-year averages. For instance, L3Harris currently trades at an EV/S of 3.14, approximately 1.5 times its 20-year average of 2.14. RTX Corp’s (RTX) current ratio of 3.32 is nearly double its historical mean of 1.74. Extreme cases have also emerged: Kratos Defense & Security Solutions (KTOS) currently commands a staggering EV/S of 10.08, compared to its two-decade average of just 1.59.
These premium valuations imply the market is pricing in extremely optimistic long-term growth expectations. Yet, significant risks lie beneath the surface.
First is the risk of de-escalation. Should any major geopolitical conflict see an unexpected easing or resolution—such as a ceasefire in Ukraine—the “permanent tension” narrative currently propping up high valuations would face a direct challenge.
Second, policy uncertainty looms. While U.S. defense budgets are in focus, their final size and allocation are subject to a contentious political process, creating uncertainty. The policy signal from President Trump has been mixed, advocating for a larger budget while also suggesting restrictions on defense company dividends and buybacks.
Finally, there may be limited room for multiple expansion. Even if global tensions persist, the potential for valuation multiples to expand further from their current historical highs appears constrained. This means future stock price appreciation would rely more heavily on actual earnings growth rather than investors willing to pay an ever-higher price for each dollar of sales.
A turbulent world undoubtedly provides a powerful long-term narrative and fundamental support for the defense sector. However, investing is not just about the “story”; it is fundamentally about the “price.” When investors pay a steep premium for uncertainty, they simultaneously expose themselves to the risk of a valuation correction.
Historical data clearly indicates that U.S. defense stocks, as a group, are trading at historically high valuations. While chasing returns fueled by geopolitical unrest, investors would be wise to heed the recurring market adage: “No matter how hot the defense market gets, there’s always a risk in paying too high a price.”
