Banking stability is a critical component of financial systems, particularly in the context of increasing global integration and technological advancements. This study investigates the impact of corporate bond issuance and financial development on banking stability in OECD countries from 2010 to 2022, with a focus on the mediating roles of Fintech and Big Data. Utilizing a combination of panel data regression and 2 step System GMM techniques, we find that corporate bond issuance and financial development significantly enhance banking stability, particularly in developed economies. However, the impact varies across different economic and technological contexts, with Big Data emerging as a significant mediator, while Fintech shows a more limited role. These findings suggest that policymakers should tailor financial and technological policies to the specific conditions of their economies, promoting corporate bond markets and financial development while leveraging technological innovations to enhance banking stability. Future research should explore these dynamics in non-OECD countries and over longer periods.

Keywords: Corporate bond issuance, Financial development, Fintech, Big data, Banking stability, OECD