Abstract
This paper is the first to quantify and analyze the dynamics of market risk (MR) and interest rate risk (IRR) of the system of US bank holding companies (BHCs) based on time-varying risk exposures estimated using the Kalman filter. These dynamics can be ex-plained to a considerable degree by the development of the macro economy as well as by the state and structure of the banking system itself. We further determine each single bank’s contribution to the banking system’s MR and IRR and show that single banks have non-trivial leverage over the banking system’s systematic risk exposure at specific times. Such risk contributions can be explained by banks’ financing or deposit base, maturity transformation intensity and interest income, earnings diversification and the liquidity of banks’ holdings. Our findings thus facilitate better oversight and management of the systematic risks inherent in the banking system.
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Notes
We use the expressions “BHC” and “bank” interchangeably. When referring to banking subsidiaries of BHCs, we use the term “commercial bank”.
We follow, e.g., Kashyap et al. (2002), acknowledging the same biases in these variables (like double counting of inter-subsidiary business or the omission of non-bank activities).
We follow the standard approach to screening the Thomson/Reuters Datastream return data introduced by Ince and Porter (2006).
See Micro Report Series Description, http://www.federalreserve.gov/reportforms/mdrm/pdf/BHCF.PDF “Beginning March 31, 2006, the FR Y-9C and the FR Y-9LP filing threshold was increased from $150 million to $500 million or more and the reporting exception that required each lower-tier bank holding company with total consolidated assets of $1 billion or more to file the FR Y-9C was eliminated.”.
Under this definition of the interest rate factor negative IRR betas indicate a negative bank portfolio stock return for increases in interest rates.
The first 355 states estimated on return data available before the sample period are used to allow for enough time for the diffuse initialization but are dropped from further analyses also due to the constrained availability of macro and banking variables.
As each month’s last weekly beta is later matched to end-of-month macro variables, we already present results and base the following arguments on each month’s last weekly betas to conserve space. As expected from a measure without unit like a regression coefficient, distributions of betas at the weekly frequency are highly similar and this approach does not change conclusions drawn in this section. Descriptive statistics of IRR betas at the weekly frequency can be obtained from the authors on request.
Variables 1–19 describe output with production in different sectors, variables 20–44 employment and working hours, variables 45–54 contain information on the stock of orders, 55–64 housing including prices and starts of construction, 65–87 describe the financial environment including stock market, interest rates and spreads and exchange rates, 88–94 describe the monetary policy with monetary bases and reserve requirements, and 95–119 describe prices for producers and consumers. For detailed definitions of the numbered macroeconomic variables (most of them on a seasonally-adjusted basis) and of the transformations applied to ensure stationarity, see Appendix 1.
Visual inspection of the scree plot leads to the decision for the cutoff at nine factors, as additional factors add substantially less marginal explanatory power to the factor structure.
We use lagged rather than contemporary independent variables to control for endogeneity and reverse causality of the relations.
Multicollinearity is not an issue here, as shown by variance inflation factors (VIF): mean VIF of the variables is 1.45 with NPL exhibiting the highest value of 2.03.
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We thank Oliver Entrop and two anonymous reviewers for very helpful comments and suggestions to improving the paper. All remaining errors are our own.
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von la Hausse, L., Rohleder, M. & Wilkens, M. Systemic interest rate and market risk at US banks. J Bus Econ 86, 933–961 (2016). https://doi.org/10.1007/s11573-016-0830-8
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DOI: https://doi.org/10.1007/s11573-016-0830-8