Liquidity, interbank network topology and bank capital

Abstract

Purpose While previous literature has emphasized the causal relationship from liquidity to capital, the impact of interbank network characteristics on this relationship remains unclear. By applying the interbank network simulation, this paper aims to examine whether the causal relationship between capital and liquidity is influenced by bank positions in the interbank network. Design/methodology/approach Using the sample of 506 commercial banks established in 28 European countries from 2001 to 2013, the author adopts the generalized method of moments simultaneous equations approach to investigate whether interbank network characteristics influence the causal relationship between bank capital and liquidity. Findings Drawing on a sample of commercial banks from 28 European countries, this study suggests that the interconnectedness of banks within interbank loan and deposit networks shapes their decisions to establish higher or lower regulatory capital ratios in the face of increased illiquidity. These findings support the implementation of minimum liquidity ratios alongside capital ratios, as advocated by the Basel Committee on Banking Regulation and Supervision. In addition, the paper underscores the importance of regulatory authorities considering the network characteristics of banks in their oversight and decision-making processes. Originality/value This paper makes a valuable contribution to the current body of research by examining the influence of interbank network characteristics on the relationship between a bank’s capital and liquidity. The findings provide insights that add to the ongoing discourse on regulatory frameworks and emphasize the necessity of customized approaches that consider the varied interbank network positions of banks.

Integrated Strategic Analytical Framework for Analysing and Improving A Bank’s Market Performance during Periods of Disruptive Competition

“…Price-to-book ratio is used by the investors to measure and compare the bank's market capitalization to its book value. It is also used for evaluating and comparing the performance of the bank with the other rival banks that are operating in similar sectors (Ardekani, 2023). Price-tobook ratio is measured by dividing the bank's current stock price per share with its book value per share.…”