The pro-cyclicality of risk weights for credit exposures: Driven by the retail segment

This paper examines the pro-cyclicality of implicit risk weights of credit exposures and the potential contribution of accommodative monetary policy using data for the Czech Republic. The empirical results indicate that risk weights behave pro-cyclically under the IRB approach and acyclically under the STA approach. The pro-cyclical behaviour of IRB risk weights is caused primarily by the retail exposures, the strongest effects being in the highest and lowest quantiles of risk weights. The risk weights for retail exposures behave pro-cyclically not only with regard to the business cycle, but also with respect to the financial cycle and house price growth. In addition, monetary policy easing contributes to the pro-cyclicality in higher quantiles of risk weights.     

Bank ownership and credit over the business cycle: Is lending by state banks less procyclical?

This paper finds that lending by state banks is less procyclical than lending by private banks, especially in countries with good governance. Lending by state banks in high income countries is even countercyclical. On the liability side, state banks expand their total liabilities and, in particular, their non-deposit liabilities relatively little during booms. Public banks also report loan non-performance more evenly over the business cycle. Overall our results suggest that state banks can play a useful role in stabilizing credit over the business cycle as well as during periods of financial instability. However, the track record of state banks in credit allocation remains quite poor, questioning the wisdom of using state banks as a short term countercyclical tool.     

BANK CAPITAL REQUIREMENTS, BUSINESS CYCLE FLUCTUATIONS AND THE BASEL ACCORDS: A SYNTHESIS

Abstract.  In order to survey the mechanisms through which the introduction of Basel II bank capital requirements is likely to accentuate the procyclical tendencies of banking, this paper brings together the theoretical literature on the bank capital channel of propagation of exogenous shocks and the literature on the regulatory framework of capital requirements under the Basel Accords. We conclude that the theoretical models that revisit the bank capital channel under the new accord generally support the Basel II procyclicality hypothesis and that the magnitude of the procyclical effects essentially depends on (i) the composition of banks' asset portfolios, (ii) the approach adopted by banks to compute their minimum capital requirements, (iii) the nature of the rating system used by banks, (iv) the view adopted concerning how credit risk evolves through time, (v) the capital buffers over the regulatory minimum held by the banking institutions, (vi) the improvements in credit risk management and (vii) the supervisor and market intervention under Basel II. The recent events and instability in financial markets all over the world have led the procyclicality issue to enter the agendas of several political international  fora  and some measures to mitigate procyclicality are being put forward. The bank capital channel literature should now play an important role in evaluating their effectiveness.     

发达国家和发展中国家财政政策顺周期问题的研究与借鉴

国外关于发达国家和发展中国家财政政策顺周期问题的研究结果表明:(一)发达国家财政政策具有温和的逆周期性,即在经济上升期增加收入、减少支出、在经济下滑期减少收入、增加支出;也有一些研究成果认为发达国家的财政收入、财政支出具有顺周期性。(二)发展中国家财政收入、财政支出等政策变量,在经济上升期,具有快速增长的顺周期性;在经济下滑期,具有快速减少的顺周期性。     

Macroeconomic stabilization in developing economies: Are optimal policies procyclical?

Many empirical studies provide evidence that macroeconomic policies as well as capital flows exhibit procyclical characteristics in developing economies. In particular Kaminsky et al. [2004. When it rains, it pours: Procyclical capital flows and macroeconomic policies. NBER Macroeconomics Annual, MIT Press] demonstrate that a large group of middle-income countries run contractionary policies and experience capital flight during times of recession. This paper investigates the role of international financial markets in explaining these macroeconomic policy and capital flow characteristics. An optimal fiscal and monetary policy problem is formulated and solved for a small-open economy that faces a country-specific interest rate spread in international financial markets. It is found that, in the presence of the country spread, optimal fiscal and monetary policies as well as capital flows are procyclical under a reasonable parametrization. Optimal policies and capital flows turn countercyclical in the absence of the country spread. This pattern is robust to a range of alternative model specifications.     

Market procyclicality and systemic risk

We develop a model that captures, at the same time, the temporal dynamics of single-firm credit risk and the contagion across banks via a network of obligations and common assets. In particular, we enrich the continuous-time modelling approach of default by accounting explicitly for the procyclical loop between asset prices and leverage. Contagion can spread well before any default occurs, through the value of the obligations held by counterparties. Moreover, the extent of procyclicality effects depends explicitly on the structure of both the interbank network and the asset bank network. We analyse the model in a simplified scenario of a densely connected core of banks and we carry out a systematic investigation of how procyclicality emerges from the multiplicative interplay of market illiquidity and tightness of capital requirements.     

Banking systemic vulnerabilities: A tail-risk dynamic CIMDO approach

This study proposes a novel framework which combines marginal probabilities of default estimated from a structural credit risk model with the consistent information multivariate density optimization (CIMDO) methodology and the generalized dynamic factor model (GDFM) supplemented by a dynamic t-copula. The framework models banks’ default dependence explicitly and captures the time-varying non-linearities and feedback effects typical of financial markets. It measures banking systemic credit risk in the three forms categorized by the European Central Bank: (1) credit risk common to all banks; (2) credit risk in the banking system conditional on distress on a specific bank or combinations of banks; and (3) the buildup of banking system vulnerabilities over time which may unravel disorderly. In addition, the estimates of the common components of the banking sector short-term and conditional forward default measures contain early warning features, and the identification of their drivers is useful for macroprudential policy. Finally, the framework produces robust out-of-sample forecasts of the banking systemic credit risk measures. This paper advances the agenda of making macroprudential policy operational.     

Macroprudential regulation and macroeconomic activity

I develop a dynamic stochastic general equilibrium model to examine the impact of macroprudential regulation on banks’ financial decisions and the implications for the real sector. I model an occasionally binding capital requirement constraint and analyze its costs and benefits. This friction means that the banks refrain from valuable lending. At the same time, capital requirements provide structural stability to the financial system. I show that higher capital requirements can dampen the business cycle fluctuations and raise welfare. I also show that switching to a countercyclical capital requirement regime can help reduce volatility and raise welfare. Finally, by means of the welfare analysis, I also obtain the optimal level of capital requirement.     

The procyclicality of loan loss provisions in Islamic banks

From a sample of Islamic banks around the world from 1997 to 2012, this paper examines whether loan loss provisioning in Islamic banks is procyclical. Our empirical findings highlight that loan loss provisioning in Islamic banks remains procyclical, although the ‘expected’ loan loss model (E-LLM) has been implemented for Islamic banks in several countries. A closer investigation further documents that Islamic banks also use loan loss provisions for discretionary managerial actions, especially related to capital management in which loan loss reserves and provisions are inflated when bank capitalization declines. Eventually, this paper highlights that higher capitalization can mitigate the procyclicality of loan loss provisions in Islamic banks. In other words, loan loss provisioning becomes countercyclical for Islamic banks with higher capitalization. This paper therefore casts doubts on the adoption of the E-LLM for Islamic banks to promote countercyclical effects, because the E-LLM may be influenced by managerial discretion, including opportunistic capital management using loan loss provisions that may undermine the importance of maintaining bank capitalization.     

Bank fee-based shocks and the U.S. business cycle

Efficient liquidity matching requires from banks to track external shocks (e.g., GDP growth shocks, stock market shocks and monetary policy shocks) in order to optimally allocate their assets between loans and other business lines. Profit maximizing banks have to rebalance their product-mix to take advantage of these changes. However, even though banking is cyclical, and contemporaneously reacts to shocks outside the banking sphere, there may also be some feedback effects at play, whereby bank changes, in turn, could affect economic and financial conditions. Generalizing the results of Marcucci and Quagliariello (2006, 2009), who indeed find an asymmetric impact of credit shocks on economic and financial time series in recession, we use a similar VAR framework to show that an even stronger feedback effect is prevalent for fee-based shocks. If the feedback effects of credit and fee-based shocks might have been both at play before the subprime crisis, the feedback effect of credit shocks seems to have faded away during the subprime crisis, whereas the feedback effect stemming from fee-based shocks has gained further strength.