Working paper series / Johann-Wolfgang-Goethe-Universität Frankfurt am Main, Fachbereich Wirtschaftswissenschaften : Finance & Accounting
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95
Recent changes in accounting regulation for financial instruments (SFAS 133, IAS 39) have been heavily criticized by representatives from the banking industry. They argue for retaining a historical cost based "mixed model" where accounting for financial instruments depends on their designation to either trading or nontrading activities. In order to demonstrate the impact of different accounting models for financial instruments on the financial statements of banks, we develop a bank simulation model capturing the essential characteristics of a modern universal bank with investment banking and commercial banking activities. In our simulations we look at different scenarios with periods of increasing/decreasing interest rates using historical data and with different banking strategies (fully hedged; partially hedged). The financial statements of our model bank are prepared under different accounting rules ("Old" IAS before implementation of IAS 39; current IAS) with and without hedge accounting as offered by the respective sets of rules. The paper identifies critical issues of applying the different accounting rules for financial instruments to the activities of a universal bank. It demonstrates important shortcomings of the "Old" IAS rules (before IAS 39), and of the current IAS rules. Under the current IAS rules the results of a fully hedged bank may have to show volatility in income statements due to changes in market interest rates. Accounting results of a partially hedged bank in the same scenario may be less affected even though there are economic gains or losses.
94
Portfolio choice and estimation risk : a comparison of Bayesian approaches to resampled efficiency
(2002)
Estimation risk is known to have a huge impact on mean/variance (MV) optimized portfolios, which is one of the primary reasons to make standard Markowitz optimization unfeasible in practice. Several approaches to incorporate estimation risk into portfolio selection are suggested in the earlier literature. These papers regularly discuss heuristic approaches (e.g., placing restrictions on portfolio weights) and Bayesian estimators. Among the Bayesian class of estimators, we will focus in this paper on the Bayes/Stein estimator developed by Jorion (1985, 1986), which is probably the most popular estimator. We will show that optimal portfolios based on the Bayes/Stein estimator correspond to portfolios on the original mean-variance efficient frontier with a higher risk aversion. We quantify this increase in risk aversion. Furthermore, we review a relatively new approach introduced by Michaud (1998), resampling efficiency. Michaud argues that the limitations of MV efficiency in practice generally derive from a lack of statistical understanding of MV optimization. He advocates a statistical view of MV optimization that leads to new procedures that can reduce estimation risk. Resampling efficiency has been contrasted to standard Markowitz portfolios until now, but not to other approaches which explicitly incorporate estimation risk. This paper attempts to fill this gap. Optimal portfolios based on the Bayes/Stein estimator and resampling efficiency are compared in an empirical out-of-sample study in terms of their Sharpe ratio and in terms of stochastic dominance.
93
Substantial research attention has been devoted to the pension accumulation process, whereby employees and those advising them work to accumulate funds for retirement. Until recently, less analysis has been devoted to the pension decumulation process – the process by which retirees finance their consumption during retirement. This gap has recently begun to be filled by an active group of researchers examining key aspects of the pension payout market. One of the areas of most interesting investigation has been in the area of annuities, which are financial products intended to cover the risk of retirees outliving their assets. This paper reviews and extends recent research examining the role of annuities in helping finance retirement consumption. We also examine key market and regulatory factors.
92
The classical approaches to asset allocation give very different conclusions about how much foreign stocks a US investor should hold. US investors should either allocate a large portion of about 40% to foreign stocks (which is the result of mean/variance optimization and the international CAPM) or they should hold no foreign stocks at all (which is the conclusion of the domestic CAPM and mean/variance spanning tests). There is no way in between.
The idea of the Bayesian approach discussed in this article is to shrink the mean/variance efficient portfolio towards the market portfolio. The shrinkage effect is determined by the investor's prior belief in the efficiency of the market portfolio and by the degree of violation of the CAPM in the sample. Interestingly, this Bayesian approach leads to the same implications for asset allocation as the mean-variance/tracking error criterion. In both cases, the optimal portfolio is a combination of the market portfolio and the mean/variance efficient portfolio with the highest Sharpe ratio.
Applying both approaches to the subject of international diversification, we find that a substantial home bias is only justified when a US investor has a strong belief in the global mean/variance efficiency of the US market portfolio and when he has a high regret aversion of falling behind the US market portfolio. We also find that the current level of home bias can be justified whenever-regret aversion is significantly higher than risk aversion.
Finally, we compare the Bayesian approach of shrinking the mean/variance efficient portfolio towards the market portfolio to another Bayesian approach which shrinks the mean/variance efficient portfolio towards the minimum-variance portfolio. An empirical out-of-sample study shows that both Bayesian approaches lead to a clearly superior performance compared to the classical mean/variance efficient portfolio.
91
Who knows what when? : The information content of pre-IPO market prices : [Version March/June 2002]
(2002)
To resolve the IPO underpricing puzzle it is essential to analyze who knows what when during the issuing process. In Germany, broker-dealers make a market in IPOs during the subscription period. We examine these pre-issue prices and find that they are highly informative. They are closer to the first price subsequently established on the exchange than both the midpoint of the bookbuilding range and the offer price. The pre-issue prices explain a large part of the underpricing left unexplained by other variables. The results imply that information asymmetries are much lower than the observed variance of underpricing suggests.
91 rev.
To resolve the IPO underpricing puzzle it is essential to analyze who knows what when during the issuing process. In Germany, broker-dealers make a market in IPOs during the subscription period. We examine these pre-issue prices and find that they are highly informative. They are closer to the first price subsequently established on the exchange than both the midpoint of the bookbuilding range and the offer price. The pre-issue prices explain a large part of the underpricing left unexplained by other variables. The results imply that information asymmetries are much lower than the observed variance of underpricing suggests.
90
We propose a new framework for modelling time dependence in duration processes on financial markets. The well known autoregressive conditional duration (ACD) approach introduced by Engle and Russell (1998) will be extended in a way that allows the conditional expectation of the duration process to depend on an unobservable stochastic process, which is modelled via a Markov chain. The Markov switching ACD model (MSACD) is a very flexible tool for description and forecasting of financial duration processes. In addition the introduction of an unobservable, discrete valued regime variable can be justified in the light of recent market microstructure theories. In an empirical application we show, that the MSACD approach is able to capture several specific characteristics of inter trade durations while alternative ACD models fail. Furthermore, we use the MSACD to test implications of a sequential trade model.
89
Executive Stock Option Programs (SOPs) have become the dominant compensation instrument for top-management in recent years. The incentive effects of an SOP both with respect to corporate investment and financing decisions critically depend on the design of the SOP. A specific problem in designing SOPs concerns dividend protection. Usually, SOPs are not dividend protected, i.e. any dividend payout decreases the value of a manager’s options. Empirical evidence shows that this results in a significant decrease in the level of corporate dividends and, at the same time, into an increase in share repurchases. Yet, few suggestions have been made on how to account for dividends in SOPs. This paper applies arguments from principal-agent-theory and from the theory of finance to analyze different forms of dividend protection, and to address the relevance of dividend protection in SOPs. Finally, the paper relates the theoretical analysis to empirical work on the link between share repurchases and SOPs.
88
For the Neuer Markt year 2001 is not considered as one of its best, compared to its prior performance. Investors who once piled into the Neuer Markt have now become wary of the exchange, which was launched in 1997 as Europe’s leading growth market and answer to the U.S.‘s Nasdaq Stock Market. The Neuer Markt’s reputation has been marred by the misleading information policy from several Neuer Markt companies, publishing false annual and quarterly data. Some of these companies are responsible for having misinformed investors of their pending bankruptcies. Under these circumstances, it is time to find an explanation for the dramatic loss of credibility in Neuer Markt enterprises. Finding an answer, two aspects come under consideration: • What type of information (annual versus quarterly reports) was available for investors and • of what quality were these provided data. Interim reports can be seen as important instrument in the reporting system to inform all kinds of investors. For this reason we examine the quality of Neuer Markt quarterly reports by concentrating on the disclosure level of 52 Neuer Markt companies‘ reports for the third quarter 1999 and 2000. To enable comparison we establish four disclosure indexes that measure the report’s compliance with the Neuer Markt Rules and Regulations as well as with IAS and US GAAP interim reporting standards. The results demonstrate that the level of disclosure has increased over time. Then we aim to find typical attributes of Neuer Markt enterprises that provide high or low level of accounting information in their quarterly reports. Nevertheless the study also shows that there is not any correlation between market capitalization and the quality of interim reports. However, it can be suggested that an additional enforcement mechanism could improve quality and lure investors back. A step towards this aim is the standardization project of quarterly reports of Deutsche Boerse AG.
87a
Access to loans and other financial services is extremely valuable for micro-, small- and medium-sized enterprises in developing and transition countries as it enables their owners as well as their employees to exploit their economic potential and to increase their income. Although this insight has lead development aid institutions to undertake many attempts to create sustainable microfinance institutions, only a small fraction of these has been successful so far. This article analyses what determines the success of attempts to provide financial services in general, and credit in particular, to low income target groups in these countries. We argue that it is crucial to understand, and to mitigate or even eliminate in practice, the serious and numerous incentive problems at the level of the lending operations as well as those at the levels of the human resource management and the governance of microfinance institutions. We attempt to show moreover, that unsolved incentive problems at only one level will ultimately undermine any potential success at the other levels. In our paper, we first analyse information and incentive problems from a theoretical perspective, using and extending the well-known Stiglitz-Weiss model of credit rationing, and derive theoretical requirements for solutions of these problems. In the light of these considerations, we then discuss how problems are solved in practice. Section 3 deals with the credit relationship. Section 4 extends the argument by showing how incentive problems within the institution can be handled, and section 5 analyses corporate governance-related problems of development finance institutions as incentive problems. In section 6 it is demonstrated why, and how, the incentive problems at the different levels, as well as their solutions, are interrelated. From this we derive the proposition that, as the institutional devices for dealing with these problems constitute a complementary system, any sustainable solution requires consistent arrangements of all elements and at all levels of the system. In the last section we will show the potential of strategic networks to set up institutions which we consider to be consistent systems for successfully solving the problems at all three levels simultaneously.
87
Während sich die Entwicklungsfinanzierung in Theorie und Praxis generell mit dem Finanzwesen in Entwicklungs- und Transformationsländern befasst, steht im Teilgebiet der Microfinance die Frage im Vordergrund, wie in diesen Ländern der Zugang ärmerer Bevölkerungsgruppen und speziell von Klein- und Kleinstunternehmer(innen), Kleinbauern und sonstigen wirtschaftlich Selbständigen aus eher niedrigen sozialen Schichten zu Kredit und anderen Finanzdiensleistungen verbessert werden kann. Obwohl es einige Vorläufer gibt, die schon früh die allgemeine Politik der Entwicklungsländer bezüglich ihrer Finanzsektoren und ebenso die dazu passende Entwicklungshilfe-Politik der Industrieländer der 60er und 70er Jahre mit ökonomisch-theoretischen Argumenten scharf kritisiert haben,1 waren in der Vergangenheit weder Entwicklungsfinanzierung im allgemeinen noch Microfinance im besonderen ein wirklich ernst genommener Gegenstand der ökonomischen Literatur, die man zum mainstream rechnen kann. Dem entspricht es, dass sich auch die Praxis der Entwicklungsfinanzierung sehr lange weitgehend unabhängig von ökonomisch- theoretischen Überlegungen vollzogen hat. Diese Situation hat sich seit mehr als einem Jahrzehnt grundlegend verändert. Dies hat einen wesentlichen Grund darin, dass sich in der entwicklungspolitischen Praxis auf dem Gebiet der Finanzierung von Klein- und Kleinstbetrieben, eben Microfinance, Erfolge erzielen ließen, die vorher unvorstellbar waren. Mit einer deutlichen commercial orientation und einer Ausrichtung auf die genuinen Probleme des financial institution building konnte erreicht werden, dass es inzwischen einige Dutzend Finanzinstitutionen in Entwicklungs- und Transformationsländern gibt, die ökonomisch stabil und sogar profitabel sind und mit ihrem Leistungsangebot eine große Anzahl von "armen" Kunden erreichen, die bei den Kreditabteilungen der herkömmlichen Banken kaum über die Schwelle gelassen würden.2 Dies hat die Aufmerksamkeit von Forschern aus dem mainstream erweckt. Mindestens ebenso wichtig sind aber die immanenten Entwicklungen innerhalb der ökonomischen Theorie. Mit ihrer Hinwendung zum institutionalistischen Denkansatz hat die Wirtschaftstheorie auf einmal eine neue Aufmerksamkeit für die Phänomene entwickelt, die für die Praktiker der Entwicklungsfinanzierung seit langem von zentraler Bedeutung sind: Inzwischen kann man theoretisch nachweisen, dass es in der Tat Zugangsprobleme zu Kredit für "kleine Leute" gibt, dass das Angebot von Kredit für sie beschränkt ist und dass es nicht genügt, einfach nur staatlich auferlegte Restriktionen – die so genannte financial repression – zu beseitigen, um ....
85
Our study provides evidence on the share price reactions to the announcement of equity issues in Germany, where capital market is characterized by institutional features distinct from the U.S. market. German seasoned equity issues yield a positive market reaction which contrasts to the significant negative abnormal returns reported for the U.S. We provide evidence that these results are due to differences in both issuing characteristics and floatation methods, and in the corporate governance and ownership structures of the two countries. Our study explains much of the empirical puzzle of different market reactions to seemingly similar events across financial markets.
83
In this paper we have developed a financial model of the non-life insurer to provide assistance for the management of the insurance company in making decisions on product, investment and reinsurance mix. The model is based on portfolio theory and recognizes the stochastic nature of and the interaction between the underwriting and investment income of the insurance business. In the context of an empirical application we illustrate howa portfolio optimisation approach can be used for asset-liability management.
82
The present paper seeks to study the possible diversification potential by the integration of indirect real estate investments in international portfolios. To this end, monthly index-return time-series in the time-period from January 1985 till December 1998 from real estate investment companies as well as common stocks and bonds in Germany, France, Switzerland, Great Britain and the USA were used. We utilize, due to the critical normal distribution assumption, a mean/lower-partial-moment framework. In order to take into account the influence of the currency risk for international investments the analyses have been undertaken both with as well as without hedging the currency risk. We take the viewpoint of a German as well as that of a US-investor to gain insight into the dependency of the diversification potential on the reference currency of the investor.
81
Im Rahmen wertorientierter Unternehmensführung gewinnen Erfolgsbeteiligungen immer größere Verbreitung. Besonders populär ist das EVA-Bonussystem, das auf dem Erfolgskonzept "Economic Value Added" von STERN STEWART & Co. beruht. In der vorliegenden Arbeit wird gezeigt, daß dieses Bonussystem gegen die Bedingung der Anreizkompatibilität verstößt: Der Entscheidungsträger kann finanzielle Vorteile erzielen, indem er Investitionsentscheidungen trifft, die aus Sicht der Anteilseigner nachteilig sind. Insbesondere besteht die Tendenz zur Unterinvestition. Die Darstellungen beruhen auf der Annahme, daß nicht nur die Anteilseigner zukünftige Einkünfte (bzw. Überschüsse) mit einem risikoangepaßten Zinssatz diskontieren, sondern auch der Entscheidungsträger. Zunächst werden die theoretischen Grundlagen dargestellt. Wenn bei gegebener Risikoklasse der Entscheidungsträger erwartete Prämien mit dem Kalkulationszinsfuß k +D diskontiert und die Anteilseigner erwartete Überschüsse des Leistungsbereichs mit k diskontieren, besteht bei einem im Zeitablauf konstanten Prämiensatz f und Überschußbeteiligung nur dann Anreizkompatibilität, wenn D= 0 gilt. Für D> 0 besteht die Tendenz zur Unterinvestition. Sie ist um so größer, je höher D ist und je später die potentiellen Projektüberschüsse anfallen. Bei Beteiligung am Residualgewinn ergeben sich dieselben Anreizwirkungen wie bei Überschußbeteiligung, sofern die kalkulatorischen Zinsen mit dem risikolosen Zinssatz r ermittelt werden. Werden sie mit k ermittelt, so wird (für k>r ) im Vergleich zu einer Überschußbeteiligung die Tendenz zur Unterinvestition ausgelöst (sofern D= 0) oder verstärkt (sofern D> 0). Die Tendenz zur Unterinvestition ist jeweils um so gravierender, je später aktivierte Anschaffungsauszahlungen als Abschreibungen zu verrechnen sind und je höher der für die Ermittlung der kalkulatorischen Zinsen auf die (Rest-)Buchwerte maßgebliche Zinssatz k ist. Der Economic Value Added stellt eine Konkretisierung des Residualgewinns dar. Auch bei dem darauf aufbauenden (EVA-)Bonussystem besteht die Tendenz zu Fehlentscheidungen (insbesondere zur Unterinvestition). Sie resultiert vor allem aus der Ermittlung der kalkulatorischen Zinsen mit dem risikoangepaßten Zinssatz k, den geforderten "Bereinigungen" bei der Ermittlung des investierten Kapitals bzw. des Periodenerfolges und gegebenenfalls der Wahl der Erfolgsänderung gegenüber dem Vorjahr als Bemessungsgrundlage.
80
Vor dem Hintergrund allgemeiner Bedingungen der Anreizkompatibilität wird für verschiedenen Kapitalmarktmodelle untersucht, ob zwischen den Anteilseignern eines Unternehmens Einmütigkeit besteht und, wenn ja, mit welchem Unternehmensziel der finanzielle Nutzen der Anteilseigner maximiert wird. Von besonderer Bedeutung für die Anreizkompatibilität der üblichen linearen Erfolgsteilung ist die Bedingung pareto-effizienter Risikoteilung. Sind für den Erfolg des Unternehmens spezifische Störterme relevant und soll der Entscheidungsträger in relativ starkem Umfang am Erfolg beteiligt werden, ist die Risikoteilung zwischen ihm und den (anderen) Anteilseignern pareto-inferior. Anreizkompatible erfolgsorientierte Belohnungs- bzw. Prämienfunktionen für den Entscheidungsträger sind dann konvex und zustandsabhängig. Aktienoptionsprogramme können als Approximationen an solche Prämienfunktionen interpretiert werden.
079
Banking and markets
(2001)
This paper integrates a number of recent themes in the literature in banking and asset markets–optimal risk sharing, limited market participation, asset-price volatility, market liquidity, and financial crises–in a general-equilibrium theory of the financial system. A complex financial system comprises both financial markets financial institutions. Financial institutions can take the form of intermediaries or banks. Banks, inlike intermediaries, are subject to runs, but crises do not imply market failure. We show that a sophisticated financiel system–a system with complete markets for aggregate risk and limited market participation–is incentive-efficient, if the institutions take the form of intermediaries, or else constrained-efficient, of they take the form of banks. We also consider an economy in which the markets for aggregate risks are incomplete. In this context, there is a rolefpr prudential regulation: regulating liquidity can improve welfare.
78
We analyze exchange rates along with equity quotes for 3 German firms from New York (NYSE) and Frankfurt (XETRA) during overlapping trading hours to see where price discovery occurs and how stock prices adjust to an exchange rate shock. Findings include: (a) the exchange rate is exogenous with respect to the stock prices; (b) exchange rate innovations are more important in understanding the evolution of NYSE prices than XETRA prices; and (c) most (but not all) of the fundamental or random walk component of firm value is determined in Frankfurt.