Showing 1 - 10 of 91
We introduce an adaptive importance sampling method for the loss distribution of credit portfolios based on the Robbins-Monro stochastic approximation procedure. After presenting the subtle construction of the algorithm, we apply our adaptive scheme for calculating the risk figures of a typical...
Persistent link: https://www.econbiz.de/10005858875
Natural catastrophes attract regularly the attention of media and have become a source of public concern. From a financial viewpoint, natural catastrophes represent idiosyncratic risks,diversifiable at the world level. But for reasons analyzed in this pap er reinsurance markets are unable to...
Persistent link: https://www.econbiz.de/10005857781
This paper argues that observations of non-stationary choice behavior need notnecessarily imply specific properties of the individual’s discount function. As weshow, the observed “anomalies” in intertemporal choice can alternatively be explained by an individual’s perception of the risk...
Persistent link: https://www.econbiz.de/10005858206
In this paper, we characterize explicitly the first derivative of the Value at Risk and the Expected Shortfall with respect to portfolio allocation when netting between positions exists. As a particular case, we examine a simple Gaussian example in order to illustrate the impact of netting...
Persistent link: https://www.econbiz.de/10005858398
Prospect Theory is a widely accepted descriptive framework to model decisions under risk. However, it is limited to … differences in its utility, contrary to experiments. In this article we present two slight modifications to Prospect Theory which … can be theoretically well justified and solve these two problems. We derive in this way a simple model of Prospect Theory …
Persistent link: https://www.econbiz.de/10005858592
Structured financial products have gained more and more popularity in recent years, but nevertheless has their success so far notthoroughly been analyzed. In this article we develop a theoreticalframework for the design of optimal structured products and analyzethe maximal utility gain for an...
Persistent link: https://www.econbiz.de/10005857733
Market mechanisms are increasingly being used as a tool for allocating somewhat scarce but unpriced rights and resources, such as air and water. Tradable permits have emerged as the most cost effective measure leading to the emergence of both nationwide (SO2 ) and supranational (CO2 ) emission...
Persistent link: https://www.econbiz.de/10005857751
Considered here is on-line portfolio management aimed at maximizing the long-run growth of financial wealth. The portfolio is repeatedly rebalanced in response to observed returns on diverse assets. Suppose statistical information and related methods are not available - or deemed too diffcult....
Persistent link: https://www.econbiz.de/10005857758
We propose a new multivariate GARCH model with Dynamic Conditional Correlations that extends previous models by admitting multivariate thresholds in conditional volatilitiesand correlations. The model estimation is feasible in large dimensions and the positive definiteness of the conditional...
Persistent link: https://www.econbiz.de/10005858198
density. Optimality is meant in the sense of the maximization of an arbitrary preference model, e.g. Expected Utility Theory … or Prospect Theory. The proof is based on methods from transport theory. We apply the general result to specific …
Persistent link: https://www.econbiz.de/10005858203