Interbank Market and Macroprudential Tools in a DSGE Model (original) (raw)
Related papers
Macro-prudential policy on liquidity: What does a DSGE model tell us?
Journal of Economics and Business, 2011
The financial crisis has led to the development of an active debate on the use of macro-prudential instruments for regulating the banking system, in particular for liquidity and capital holdings. Within the context of a micro-founded macroeconomic model, we allow commercial banks to choose their optimal mix of assets, apportioning these either to reserves or private sector loans. We examine the implications for quantities, relative non-financial and financial prices from standard macroeconomic shocks alongside shocks to the expected liquidity of banks and to the efficiency of the banking sector. We focus on the response by the monetary sector, in particular the optimal reserve-deposit ratio adopted by commercial banks over the business cycle. Overall we find some rationale for Basel III in providing commercial banks with an incentive to hold a greater stock of liquid assets, such as reserves, but also to provide incentives to increase the cyclical variation in reserves holdings as this acts to limit excessive procyclicality of lending to the private sector.
Bank Liquidity, Interbank Markets, and Monetary Policy
Review of Financial Studies, 2011
A major lesson of the recent …nancial crisis is that the interbank lending market is crucial for banks facing large uncertainty regarding their liquidity needs. This paper studies the e¢ ciency of the interbank lending market in allocating funds. We consider two di¤erent types of liquidity shocks leading to di¤erent implications for optimal policy by the central bank. We show that, when confronted with a distributional liquidity-shock crisis that causes a large disparity in the liquidity held among banks, the central bank should lower the interbank rate. This view implies that the traditional tenet prescribing the separation between prudential regulation and monetary policy should be abandoned. In addition, we show that, during an aggregate liquidity crisis, central banks should manage the aggregate volume of liquidity. Two di¤erent instruments, interest rates and liquidity injection, are therefore required to cope with the two di¤erent types of liquidity shocks. Finally, we show that failure to cut interest rates during a crisis erodes …nancial stability by increasing the risk of bank runs.
The Role of Interbank Markets in Monetary Policy: A Model with Rationing
Journal of Money, Credit and Banking, 2008
This paper analyses the impact of asymmetric information in the interbank market and establishes its crucial role in the microfoundations of the monetary policy transmission mechanism. We show that interbank market imperfections induce an equilibrium with rationing in the credit market. This has three major implications: first, it reconciles the irresponsiveness of business investment to the user cost of capital with the large impact of monetary policy (magnitude puzzle), second, it shows that monetary policy affects long term credit (composition puzzle) and finally, that banks' liquidity positions condition their reaction to monetary policy (Kashyap and Stein liquidity puzzle).
Interbank Market Frictions-Implications for Bank Loan Supply and Monetary Policy∗
2017
We analyze the impact of overnight interbank market frictions on bank loan supply when banks face idiosyncratic liquidity risk and discuss resulting implications for monetary policy implementation. Both, frictions and risk, negatively influence bank loan supply. However, by means of its standing facilities, the central bank not only offers an alternative to using the interbank market but also determines the costs of friction-induced holdings of positive or negative precautionary liquidity. Therefore, the facilities allow the central bank to influence banks’ expected liquidity costs, and thereby their loan supply, so that interbank market frictions need not be an impediment to monetary policy transmission.
A Tale of Two Policies: Prudential Regulation and Monetary Policy with Fragile Banks
2009
We introduce banks, modeled as in Diamond and Rajan (JoF 2000 or JPE 2001), into a standard DSGE model and use this framework to study the role of banks in the transmission of shocks, the effects of monetary policy when banks are exposed to runs, and the interplay between monetary policy and Basel-like capital ratios. In equilibrium, bank leverage depends
SSRN Electronic Journal, 2014
This paper shows that depending on the distribution of banks' uncertain liquidity needs and on how monetary policy is implemented, frictions in the interbank market may reinforce the effectiveness of monetary policy. These frictions imply that with its lending and deposit facilities the central bank has an additional effective instrument at hand to impose an impact on bank loan supply. While lowering the rate on the lending facility has, taken for itself, an expansionary effect, lowering the rate on the deposit facility has a contractionary effect. This result has interesting implications for monetary policy implementation at the zero lower bound.
Economic Theory
We analyse the impact of overnight interbank market frictions on bank loan supply when banks face idiosyncratic liquidity risk and discuss resulting implications for monetary policy implementation. Sufficiently pronounced interbank market frictions imply that banks hold positive or negative precautionary liquidity. Holding positive (negative) precautionary liquidity means that banks hold more (less) liquidity than they expect to need. As holding precautionary liquidity is costly, interbank market frictions negatively influence bank loan supply. However, by means of its standing facilities, the central bank not only offers an alternative to using the interbank market but also determines the costs of friction-induced holdings of positive or negative precautionary liquidity. Therefore, the facilities allow the central bank to influence banks' expected liquidity costs, and thereby their loan supply, so that interbank market frictions need not be an impediment to monetary policy transmission.
Monetary Policy Implementation in an Interbank Network: Effects on Systemic Risk
SSRN Electronic Journal, 2000
This paper makes a conceptual contribution to the effect of monetary policy on financial stability. We develop a microfounded network model with endogenous network formation to analyze the impact of central banks' monetary policy interventions on systemic risk. Banks choose their portfolio, including their borrowing and lending decisions on the interbank market, to maximize profit subject to regulatory constraints in an asset-liability framework. Systemic risk arises in the form of multiple bank defaults driven by common shock exposure on asset markets, direct contagion via the interbank market, and firesale spirals. The central bank injects or withdraws liquidity on the interbank markets to achieve its desired interest rate target. A tension arises between the beneficial effects of stabilized interest rates and increased loan volume and the detrimental effects of higher risk taking incentives. We find that central bank supply of liquidity quite generally increases systemic risk.
Credit and Banking in a DSGE Model
2008
We extend the model in Iacoviello (2005) by introducing a stylized banking sector. Loans are supplied by imperfectly competitive banks intermediating funds from both households deposits and the interbank market. Sluggishness in bank interest rates may in principle dampen the effects of monetary policy shocks on borrowing constraints and hence on real activity, resulting in an 'attenuator' effect opposite in sign with respect to the 'financial accelerator' effect. We calibrate the banking parameters to replicate the observed sluggishness in euro area banking rates and show that this attenuator effect can be sizeable but short-lived. The model also allows analyzing the consequences of a tightening of credit conditions that reduces the supply of credit and increases banks' interest rates independently of monetary policy. In such a scenario the effects on output can be sizable, in particular on capital accumulation.