Determinants of municipal loan spreads: empirical evidence from Switzerland

This is the first study to investigate the determinants of risk premia paid by Swiss municipalities in the German-speaking part of Switzerland. This paper draws on a unique data set for Swiss municipalities collected during four surveys. Our results show that fiscal soundness has almost no impact on risk premia and that the introduction of a no-bailout policy did not result in higher spreads. On the other hand, investors’ general risk aversion, as well as interest rate levels, are strongly related to spread levels.     

Stock market contagion in Central and Eastern Europe: unexpected volatility and extreme co-exceedance

We examine whether there is contagion from the US stock market to six Central and Eastern European stock markets. We use a novel measure of contagion that examines whether volatility shocks in the US stock market coupled with negative returns are followed by higher co-exceedance between US and emerging stock markets. Using our approach and controlling for a set of market-related variables, we show that during the period from 1998 to 2014, financial contagion occurred, that is, unexpected negative events in the US market are followed by higher co-exceedance between US and Central and Eastern European stock markets. Even though contagion is stronger during the financial crisis, it also occurs in tranquil times.     

Millionaire investors: financial advisors,attribution theory and gender differences

To date little attention has been paid to how social cognitive bias can influence how financial advisors interpret and respond to the needs of millionaire investors, and if this varies depending on the gender of the investor. This research investigates whether experienced professional financial advisors who work with millionaire investors make different attributions for the control and knowledge that investors have of their investments, and if they make different investment portfolio recommendations to equivalent male and female investors. Using methodology novel to finance, this vignette-based study that controls for gender finds evidence that professional financial advisors judge millionaire female investors to have less control over their investment portfolios relative to men. Empirical results also show that female advisors judge women to be less knowledgeable about investments than men. Despite such perceptual differences, advisors recommend equally risky portfolios to male and female investors. These results have implications for wealth management institutions and the monitoring of financial advisors for millionaire individuals.     

Investigating explanatory theories on laypeople’s risk perception of personal economic collapse in a bank crisis – the Cyprus case

We investigate the explanatory power of decision, psychometric, and trust theory to describe laypeople’s risk perception of personal economic collapse in a bank crisis. The aim of this investigation is to improve the understanding of the effects of national initiatives for crisis fighting taken to prevent systemic risk. Using a stratified sample of 738 Cypriote citizens, we conducted an investigation in Cyprus in the spring of 2013 when the country was facing a bank crisis. At that point in time, the Cypriote Government had imposed capital controls to prevent a bank run. We find that decision theory variables alone have low explanatory value on laypeople’s risk perception, and that laypeople’s risk perception in this situation is affected primarily by psychometric variables. Further, confidence in one’s own bank also explains risk perception. Our findings contribute novel knowledge about risk perceptions in a financial crisis, with practical crisis management implications for regulators.     

Belief-free price formation

We analyze security price formation in a dynamic setting in which long-lived dealers repeatedly compete for the opportunity to trade with short-lived retail traders. We characterize equilibria in which dealers’ pricing strategies are optimal irrespective of the private information that each dealer may possess. Thus, our model’s predictions are robust to different specifications of the dealers’ information structure. These equilibria reconcile, in a unified and parsimonious framework, price dynamics that are reminiscent of well-known stylized facts: excess price volatility, price to trading flow correlation, stochastic volatility and inventory-related trading.     

Fast simulations in credit risk

We consider the problem of simulating tail loss probabilities and expected losses conditioned on exceeding a large threshold (expected shortfall) for credit portfolios. Our new idea, called the geometric shortcut, allows an efficient simulation for the case of independent obligors. It is even possible to show that, when the average default probability tends to zero, its asymptotic efficiency is higher than that of the naive algorithm. The geometric shortcut is also useful for models with dependent obligors and can be used for dependence structures modeled with arbitrary copulae. The paper contains the details for simulating the risk of the normal copula credit risk model by combining outer importance sampling with the geometric shortcut. Numerical results show that the new method is efficient in assessing tail loss probabilities and expected shortfall for credit risk portfolios. The new method outperforms all known methods, especially for credit portfolios consisting of weakly correlated obligors and for evaluating the tail loss probabilities at many thresholds in a single simulation run.     

Cardinality versus q-norm constraints for index tracking

Index tracking aims at replicating a given benchmark with a smaller number of its constituents. Different quantitative models can be set up to determine the optimal index replicating portfolio. In this paper, we propose an alternative based on imposing a constraint on the q-norm (0?<?q?<?1) of the replicating portfolios’ asset weights: the q-norm constraint regularises the problem and identifies a sparse model. Both approaches are challenging from an optimization viewpoint due to either the presence of the cardinality constraint or a non-convex constraint on the q-norm. The problem can become even more complex when non-convex distance measures or other real-world constraints are considered. We employ a hybrid heuristic as a flexible tool to tackle both optimization problems. The empirical analysis of real-world financial data allows us to compare the two index tracking approaches. Moreover, we propose a strategy to determine the optimal number of constituents and the corresponding optimal portfolio asset weights.     

Zur Versicherung anormaler Leben

Abstract

In einer früheren Note habe ieh versucht, eine Methode zur Konstruktion abgestufter Sterbliehkeitstafeln zu finden, welche dazu geeignet wären, bei der Abschätzung von Prämien für nicht normale Risiken das versicherungstechnische Material zu liefern. Ich hatte zu diesem Zweek für die betreffende Krankheit, als welche in erster Linie und als Beispiel die Tuberkulose gewählt wurde, zunächst die Klasse P definiert, welehe aus allen Individuen besteht, die als Todesursache die Tuberkulose anfweisen werden. Die reziproke Klasse wurde mit S bezeiehnet. Für diese beiden Klassen lassen sich mit Hilfe der schwedischen Todesursachenstatistik die Todesfalls wahrscheinlichkeiten P_x und P _x in den verschiedenen Altersjahren x annähernd bestimmen.     

Randomized observation periods for the compound Poisson risk model: the discounted penalty function

In the framework of collective risk theory, we consider a compound Poisson risk model for the surplus process where the process (and hence ruin) can only be observed at random observation times. For Erlang(n) distributed inter-observation times, explicit expressions for the discounted penalty function at ruin are derived. The resulting model contains both the usual continuous-time and the discrete-time risk model as limiting cases, and can be used as an effective approximation scheme for the latter. Numerical examples are given that illustrate the effect of random observation times on various ruin-related quantities.     

Ruin probabilities and aggregrate claims distributions for shot noise Cox processes

We consider a risk process R _t where the claim arrival process is a superposition of a homogeneous Poisson process and a Cox process with a Poisson shot noise intensity process, capturing the effect of sudden increases of the claim intensity due to external events. The distribution of the aggregate claim size is investigated under these assumptions. For both light-tailed and heavy-tailed claim size distributions, asymptotic estimates for infinite-time and finite-time ruin probabilities are derived. Moreover, we discuss an extension of the model to an adaptive premium rule that is dynamically adjusted according to past claims experience.