Credit Ratings and Firm Innovation: Evidence from Sovereign Downgrades

This study investigates the relationship between credit ratings and firm innovation activities using a cross-country sample over the 1995–2020 period. Exploiting the setting of rating agencies’ sovereign ceiling policies, our main analysis shows that a one-notch reduction in corporate credit ratings engendered by sovereign downgrades, on average, leads to a 5.90% reduction in research and development (R&D) spending. We identify the substitution of external acquisitions for internal expenditures and the increase in creditor control as the underlying mechanisms of the causal relation. Moreover, the negative impact of credit rating downgrades on R&D investment results in deterioration in patent output and firm performance. The cross-sectional analysis shows that the observed effects on innovation and firm performance are concentrated in firms with higher external finance dependence or more growth options.