Will Germany's military spending bring economic growth?

Germany has approved significant defense and infrastructure spending, aiming to bolster its military and economy. This has substantially benefited the defense sector, with Rheinmetall's stock surging and order backlogs increasing dramatically. However, economists caution that military outlays offer only a moderate economic stimulus, with studies suggesting a low return on investment compared to other sectors, primarily boosting arms manufacturers' profit margins and potentially driving price inflation due to supply constraints. Some struggling firms are also pivoting to defense production to offset losses, indicating a reallocation of existing industrial capacity rather than broad-based economic expansion.

Analysis

Germany has committed to a substantial, debt-fueled increase in defense and infrastructure spending, marking a significant fiscal policy shift effective March 18, 2025. This has directly catalyzed a boom in the German defense industry, exemplified by Rheinmetall, whose shares surged from €59 in 2020 to over €1,700 by June 2025, with its order backlog growing from €24 billion to €63 billion in the first quarter of 2025. Swiss bank UBS projects further upside, with a price target of €2,200. However, economists from the University of Mannheim present a cautious outlook, arguing the broader economic stimulus will be moderate. Their study indicates military spending has a low fiscal multiplier of just 0.5, meaning each euro of spending generates only 50 cents in economic activity, a stark contrast to higher returns from infrastructure or education investments. This suggests the spending may primarily inflate defense company profit margins rather than fostering widespread economic growth. Evidence of this is seen in struggling industrial firms like Deutz AG, which saw a 12% sales slump in 2024, now pivoting to defense production to offset losses, indicating a reallocation of existing industrial capacity rather than the creation of net new growth.

Key Decisions for Investors

• Investors with exposure to the German defense sector should acknowledge the strong tailwinds from government spending and order backlogs, but must also factor in that valuations, such as Rheinmetall's, have already seen exponential growth.
• Broader macro investors should temper expectations for a significant German GDP uplift, as economic analysis within the report indicates the military spending has a low multiplier effect and may not be sufficient to counteract weakness in other parts of the economy.
• Monitor non-defense industrial companies, as some may present opportunities by pivoting to the lucrative defense market, while others could face headwinds as capital and labor are reallocated to arms production.
• Keep a close watch on inflationary pressures within the defense supply chain, as surging demand against fixed capacity could erode profit margins for contractors despite high revenue growth.