Cost of Debt Financing and Corporate Investment in the EU-27: Deleveraging and Profit Buffers Under Monetary Tightening

The sharp rise in nominal interest rates after 2022 constitutes a substantial test for European non-financial corporations after a prolonged period of exceptionally cheap debt. This paper examines how the cost of debt financing—proxied by the lagged, ex post real long-term sovereign yield, interpreted throughout as an indicator of economy-wide financing conditions rather than a direct corporate borrowing rate—is associated with the gross investment rate of non-financial corporations in the EU-27 over 2000–2025, using harmonised annual sector accounts and two-way fixed-effects panel models, interaction designs and local projections. Three findings emerge. First, the conditional association is stronger for the real than for the nominal cost of debt: a one percentage point increase in the lagged real yield is associated with a decline of roughly 0.3–0.4 percentage points in the investment rate, and a formal test does not reject treating the nominal yield and inflation as components of the real rate. Second, this association is not stable over time: it weakens markedly after 2020, and the weakening is robust to an alternative 2022 breakpoint and to wild cluster bootstrap inference. Third, direct tests with predetermined leverage and profit shares do not account for this weakening, so stronger corporate balance sheets—including the pronounced deleveraging from around 477% to around 226% of income—remain only one candidate explanation among several. The profit-share interaction is positive, but the evidence of attenuation is weak and specification-dependent: it is not statistically significant with the one-year-lagged measure and reaches only marginal significance under two alternative measures.