In this paper, we develop a contingent claim model to evaluate a bank’s equity and liabilities that integrates the … regulation. The barrier options theory of corporate security valuation is applied to the contingent claims of a bank. The barrier … products (WMPs) and entrusted loans (ELs). The optimal bank interest margin, i.e., the spread between the loan rate and the …

interest margin (NIM) and its components, retail lending and retail deposit rates. Using two proprietary bank-level data sets …

, NIM is significantly influenced by the different institutional designs of bank-based or capital-basaed finanfical markets …. Second, there are differences in NIM caused by bank size, although these are not fully captured by our methodology. Finally …, we show significant differences by bank type: saving banks, real estate and mortgage banks, and cooperative banks report …