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Purpose The purpose of this paper is to discuss more efficient mechanisms of regulation in the financial system.Design/methodology/approach The authors developed a theoretical two-period model of financial flows (FFs) that considers households, banks, and a social planner.Findings It is important to highlight that different from other studies that do not distinguish between financial crisis and financial instability, the authors assume financial instability does not mean crisis, but represents a deviation in the behavior of the aggregate financial intermediation and in the financial operations of each bank from the equilibrium.Practical implications The practical implication of the model is the proposition of an efficient policy for financial stability based on forward-looking financial regulations.Social implications An important result is that bank failures occur when banks do not maintain sufficient resources to support the liquidity constraint from the interbank market. Another result is that the central bank reacts, via exchange of reserves with the market, to financial instability. This behavior on the part of the central bank is inefficient because the banks will assume that in the case of failure they will be “saved;” thus it creates an adverse incentive (moral hazard) that can amplify the risk over the entire financial system.Originality/value The originality of the model is the proposition of an efficient policy for financial stability based on a forward-looking financial regulation. In this strategy the regulator acts in advance (ex ante) to minimize the mismatch of FFs in relation to the flow balance. This manner of acting is a counterpoint to the financial regulation based on capital requirement. [ABSTRACT FROM AUTHOR]

This study seeks to investigate a macroeconomic approach that could help bank regulators and supervisors perform their task of ensuring financial stability. To achieve this, an attempt is made to explain the behavior of banks by analyzing aggregate time series of credit lending and deposit-taking, which are the variables involved in financial intermediation. This article's main contribution is to present evidence of banks’ behavior in their role as financial intermediaries, in terms of the performance of the variables that represent their credit-granting or deposit-taking decisions. For this purpose the study used a vector autoregressive model to construct impulse response functions and the Granger test. The results demonstrate the existence of bilateral causality between credit lending and deposit--taking, suggesting that banks actively manage the financial intermediation process. In addition, the results show that shocks to deposits destabilize the credit lending process, and credit supply shocks, in turn, destabilize deposit-taking. The latter result is important for understanding how financial instability can arise, and is thus relevant for the bank regulator. [ABSTRACT FROM PUBLISHER]