Efficient credit portfolio management is a key success factor of bank management. Discussions of the new capital adequacy proposals by the Basle Committee on Banking Supervision enlighten the necessity to consider the credit risk management both from the internal and the regulatory point of view. We introduce an optimization approach for the credit portfolio that maximizes expected returns subj...

In this paper the efficiency of the electricity generation portfolio of BKW, a major Swiss utility, is analyzed. By applying mean-variance portfolio theory to the current and to possible future generation mixes, efficient frontiers are derived. The analysis based on relative changes in generation costs is complemented by an actual costs analysis. Moreover, a method that takes into account physi...

We show that the efficient frontier for a portfolio in which short positions precisely offset the long ones is composed of a pair of straight lines through the origin of the risk-return plane. This unique but important case has been overlooked because the original formulation of the mean-variance model by Markowitz as well as all its subsequent elaborations have implicitly excluded it by using ...

Recent studies in financial economics suggest that technical analysis may have merit to predictability of stock. When attempting to create an efficient portfolio of stocks, there are numerous factors to consider. The problem is that the evaluation involves many qualitative factors, which causes most approximations to go off track. This paper presents a genetic programming approach to portfolio ...

Recent studies have shown that adding a short extension to a long-only tax exempt equity portfolio leads to a more efficient portfolio. In this work, we show that these extended mandates are even more effective for investors subject to taxes. Not only is the portfolio more efficiently positioned from a pretax perspective, but it offers significant after-tax benefits from increased loss harvesti...

Determining contributions by sub-portfolios or single exposures to portfolio-wide economic capital for credit risk is an important risk measurement task. Often economic capital is measured as Valueat-Risk (VaR) of the portfolio loss distribution. For many of the credit portfolio risk models used in practice, the VaR contributions then have to be estimated from Monte Carlo samples. In the contex...

The problem of dynamic portfolio choice with transaction costs is often addressed by constructing a Markov Chain approximationof the continuous timeprice processes. Using this approximation,wepresent an efficient numerical method to determine optimal portfolio strategies under timeand state-dependent drift and proportional transaction costs. This scenario arises when investors have behavioral b...

During financial crises equity portfolios have suffered large losses. Methodologies for portfolio selection taking into account the possibility of large losses have existed for decades but their economic value is not well established. This article investigates the economic value in reducing the probability of large losses in portfolio selection. We combine mean-variance analysis with semi-param...

Portfolio selection addresses the problem of how to diversify investments in the most efficient and profitable way possible. Portfolio selection is a field of study that has been broached from several perspectives, including, among others, recommender systems. This paper presents SINVLIO (Semantic INVestment portfoLIO), a tool based on semantic technologies and fuzzy logic techniques that recom...

In this paper we present a classification of the various technologies applied for the solution of the portfolio selection problem according to the discipline and the methodological framework followed. We provide a concise presentation of the emerged categories and we are trying to identify which methods considered obsolete and which lie at the heart of the debate. On top of that, we provide a c...