Germany debt brake suspended defence spending soars

European financial markets have surged following Germany’s decision to suspend its strict “debt brake” rule, enabling a historic increase in defence and infrastructure spending. This paradigm shift has also driven a sharp rise in German government bond yields, with the interest rate on 30-year bonds jumping 25 basis points to 3.08% – the largest single-day increase since October 1998.

The Dax 30 index, tracking Germany’s largest companies, climbed by 3.6%, with industrial stocks leading the way. Similar stock market rallies were observed in London, Paris, and Milan, fuelled by anticipations of widespread defence and infrastructure spending stimulating Europe’s recovery. Shares in Rheinmetall, the German arms and automotive manufacturer, advanced by 7.2%, marking a nearly 99% increase this year. Other European defence firms such as Britain’s BAE Systems, Italy’s Leonardo, and France’s Thales also posted double-digit gains in their valuations.

The announcement followed a growing emphasis on increased European defence budgets amidst concerns about Donald Trump’s wavering commitment to NATO and escalating global political tensions. The EU recently unveiled an €800 billion defence spending initiative, and the UK plans to boost its own military budget to 2.5% of GDP by 2027 – a move anticipated to add £6 billion annually.

Germany’s landmark decision will allow defence spending exceeding 1% of GDP to bypass the constitutional debt brake, marking a significant departure from a fiscal policy entrenched since Angela Merkel’s government introduced it in 2009. The shift, agreed upon by Friedrich Merz, Germany’s chancellor-in-waiting, and the centre-left Social Democrats, includes a €500 billion infrastructure fund covering the next decade.

This policy transformation has generated optimism among analysts and economists, with some referring to it as a “sea change” in Germany’s post-war economic framework. Investment in defence and infrastructure is expected to bolster Germany’s growth trajectory, with certain forecasts predicting an uplift from near-zero growth to approximately 1.5–2% annually from 2027 onwards.

Industrial sector stocks saw significant movement following the announcement. Heidelberg Materials’ shares rose by 17%, while companies like Bilfinger and Hochtief gained 18% and 15.5%, respectively. Reflecting on this fiscal strategy, public statements from Merz have echoed a firm commitment to “do whatever it takes” to safeguard Germany’s defence and infrastructure needs in the face of mounting external pressures.

While this ambitious debt-financed initiative has pushed borrowing costs higher, Germany’s yields remain relatively affordable compared to those in the United States and United Kingdom. However, broader economic implications, including inflationary pressures and foreign-exchange performance, remain key areas for market observation in the months ahead.