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Quantifying and explaining parameter heterogeneity in the capital regulation-bank risk nexus

Journal of Financial Stability 2012 8(2), 57-68
By examining the impact of capital regulation on bank risk-taking using a local estimation technique, this paper attempts to quantify for the first time the heterogeneous response of banks towards this type of regulation in banking sectors of western-type economies. Subsequently, using this information, we examine the sources of heterogeneity. The findings suggest that the impact of capital regulation on bank risk is very heterogeneous across banks and the sources of this heterogeneity can be traced into both bank and industry characteristics, as well as into macroeconomic conditions. An important implication of the findings is that common capital regulatory umbrellas are not sufficient to promote financial stability, especially if they are not accompanied by supervisory effectiveness. On the basis of our findings, we contend that more focus should be placed on the actions needed to restrain excessive risk-taking of banks

Capital regulation, risk-taking and monetary policy: A missing link in the transmission mechanism

Journal of Financial Stability 2012 8(4), 236-251 open access
Few areas of monetary economics have been studied as extensively as the transmission mechanism. The literature on this topic has evolved substantially over the years, following the waxing and waning of conceptual frameworks and the changing characteristics of the financial system. In this paper, taking as a starting point a brief overview of the extant work on the interaction between capital regulation, the business cycle and the transmission mechanism, we offer some broader reflections on the characteristics of the transmission mechanism in light of the evolution of the financial system. We argue that insufficient attention has so far been paid to the link between monetary policy and the perception and pricing of risk by economic agents—what might be termed the “risk-taking channel” of monetary policy. We develop the concept, compare it with current views of the transmission mechanism, explore its mutually reinforcing link with “liquidity” and analyse its interaction with monetary policy reaction functions. We argue that changes in the financial system and prudential regulation may have increased the importance of the risk-taking channel and that prevailing macroeconomic paradigms and associated models are not well suited to capturing it, thereby also reducing their effectiveness as guides to monetary policy

Regulating Wall Street: The Dodd–Frank Act and the New Architecture of Global Finance, a review

Journal of Financial Stability 2012 8(2), 121-133 open access
This article is a review of a 531 page book that in turn is a review and evaluation of the 2319 page Dodd–Frank Wall Street Reform and Consumer Protection Act passed by Congress on July 16, 2010. The overriding theme of the book is to pose two approaches to attaining financial stability in the future. One approach is to establish a council of wise men and women supported by an army of highly skilled professional financial economists to formulate and implement regulations designed to prevent future financial crises that wreak havoc on the real economy and require financial support from taxpayers. This is the approach of the Dodd–Frank Act. The second approach proposed by the authors of this book is to design a taxing system that taxes systemically important financial institutions on the basis of their contribution to systemic risk. Borrowing ideas from the literature on the taxation of negative externalities their view is that financial institutions that create crises should pay for the clean-up. They also argue that requiring the financial polluters to pay for the creation of systemic risk will reduce the supply of systemic risk. The reader is invited to decide which approach is best

Household behavior and boom/bust cycles

Journal of Financial Stability 2012 8(3), 161-173
I describe household behavior in boom and bust economic cycles with a particular focus on the recent financial crisis. The behaviors are motivated by cognitive limitations and psychological bias. In boom times, households’ extrapolation bias and groupthink lead to chasing and extending asset bubbles (like tech stocks and real estate). Increasing use of debt spurs the economy and eventually overburdens households. In bust times, the biases and fear lead to selling previously popular assets at low prices. Households generally respond to bust times by spending less, repaying debt and saving more, which drags on an already slow economy. In addition, households influence businesses and governments into actions during the cycle. In the recent boom, predatory lenders preyed on cognitive limitations and biases of subprime borrowers to sell them high cost mortgages that they would not be able to repay. Another contributing factor is that during boom times, household attention is not focused on financial regulation. This is when business influences the political process and laws are enacted to loosen market regulation. These changes may extend the boom period into bubble territory. During bust times, public outcry influences politicians to tighten business regulation, likely inhibiting the economic rebound. Thus, household behavior plays an important role in economic boom/bust cycles

Bank supervision, regulation, and efficiency: Evidence from the European Union

Journal of Financial Stability 2012 8(4), 292-302 open access
This paper investigates the dynamics between key regulatory and supervisory policies and various aspects of commercial bank efficiency and performance for a sample of 22 EU countries over 2000–2008. In the first stage of the analysis we measure efficiency by employing the Data Envelopment Analysis (DEA) technique. In addition, we employ two distinct accounting ratios to capture the costs of intermediation (net interest margin) and cost effectiveness (cost-to-income ratio). Our regression framework includes truncated regressions and generalized linear models. Moreover, we carry out a sensitivity analysis for robustness using a fractional logit estimator. Our results show that strengthening capital restrictions and official supervisory powers can improve the efficient operations of banks. Evidence also indicates that interventionist supervisory and regulatory policies such as private sector monitoring and restricting bank activities can result in higher bank inefficiency levels. Finally, the evidence produced suggests that the beneficial effects of capital restrictions and official supervisory powers (interventionist supervisory and regulatory policies) on bank efficiency are more pronounced in countries with higher quality institutions.

Can capital requirements induce private monitoring that is socially optimal?

Journal of Financial Stability 2012 8(4), 252-262
This paper develops a framework for analyzing socially and privately optimal bank loan-monitoring decisions, with and without capital regulation. In contrast to the monitoring decision of a social planner who seeks to maximize the utility of aggregate consumption, banks choose to monitor only if doing so is consistent with maximizing the market value of equity. As a consequence, socially and privately optimal monitoring choices can diverge. Under some circumstances, appropriately configured capital regulation can bring private loan-monitoring decisions into line with those of the social planner. Nevertheless, the capital ratio required to attain this outcome hinges on a number of factors that are likely to be economy-specific, including the banking system's monitoring technology and its exposure to default. Thus, it is unlikely that a unique capital ratio will be able to induce socially optimal monitoring in all economies

Blanket guarantee, deposit insurance and restructuring decisions for multinational banks

Journal of Financial Stability 2012 8(2), 84-95
This paper examines blanket guarantee, deposit insurance and restructuring decisions with respect to a multinational bank (MNB) using Nash bargaining when the threat of a bank panic motivates countries to make decisions quickly. Failure of the bank would unevenly distribute externalities across countries, influencing the restructuring incentives. In equilibrium, the bank is either liquidated or one of the countries – or both – recapitalizes it. A partition of the recapitalization costs is sensitive to the country-specific benefits and costs from recapitalization, panic and liquidation. The home regulator benefits from the advantage that it is the only entity that can legally liquidate the MNB. Rational expectations regarding the bargaining result affect the incentives to declare a blanket guarantee

Assessing the systemic risk of a heterogeneous portfolio of banks during the recent financial crisis

Journal of Financial Stability 2012 8(3), 193-205 open access
This paper measures the systemic risk of a banking sector as a hypothetical distress insurance premium, identifies various sources of financial instability, and allocates systemic risk to individual financial institutions. The systemic risk measure, defined as the insurance cost to protect against distressed losses in a banking system, is a summary indicator of market perceived risk that reflects expected default risk of individual banks, risk premia as well as correlated defaults. An application of our methodology to a portfolio of twenty-two major banks in Asia and the Pacific illustrates the dynamics of the spillover effects of the global financial crisis to the region. The increase in the perceived systemic risk, particularly after the failure of Lehman Brothers, was mainly driven by the heightened risk aversion and the squeezed liquidity. Further analysis, which is based on our proposed approach to quantifying the marginal contribution of individual banks to the systemic risk, suggests that “too-big-to-fail” is a valid concern from a macro-prudential perspective of bank regulation

Value-at-Risk models and Basel capital charges

Journal of Financial Stability 2012 8(4), 303-319 open access
In the wake of the subprime crisis of 2007 which uncovered shortfalls in capital levels of most financial institutions, the Basel Committee planned to strengthen current regulations contained in Basel II. While maintaining the Internal Model Approach based on Value-at-Risk, a stressed VaR calculated over highly strung periods is to be added to present directives to constitute Minimum Capital Requirements. Consequently, the adoption of the appropriate VaR specification remains a subject of paramount importance as it determines the financial condition of the firm. In this article I explore the performance of several models to compute MCR in the context of Emerging and Frontier stock markets within the present and proposed capital structures. Considering the evidence gathered, two major contributions arise: (a) heavy-tailed distributions – particularly Extreme Value (EV) ones-, reveal as the most accurate technique to model market risks, hence preventing huge capital deficits under current measures; (b) the application of such methods could allow slight modifications to present mandate and simultaneously avoid sVaR or at least reduce its scope, thus mitigating the impact regarding the enhancement of capital base. Therefore, I suggest that the inclusion of EV in planned supervisory accords should reduce development costs and foster healthier financial structures