Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 2

Skewness Related Abstracts

2 A Mean–Variance–Skewness Portfolio Optimization Model

Authors: Kostas Metaxiotis


Portfolio optimization is one of the most important topics in finance. This paper proposes a mean–variance–skewness (MVS) portfolio optimization model. Traditionally, the portfolio optimization problem is solved by using the mean–variance (MV) framework. In this study, we formulate the proposed model as a three-objective optimization problem, where the portfolio's expected return and skewness are maximized whereas the portfolio risk is minimized. For solving the proposed three-objective portfolio optimization model we apply an adapted version of the non-dominated sorting genetic algorithm (NSGAII). Finally, we use a real dataset from FTSE-100 for validating the proposed model.

Keywords: Evolutionary Algorithms, Portfolio Optimization, Skewness, stock selection

Procedia PDF Downloads 17
1 The Influence of Beta Shape Parameters in Project Planning

Authors: Dimitra Alexiou, Stefanos Katsavounis, Αlexios Kotsakis


Networks can be utilized to represent project planning problems, using nodes for activities and arcs to indicate precedence relationship between them. For fixed activity duration, a simple algorithm calculates the amount of time required to complete a project, followed by the activities that comprise the critical path. Program Evaluation and Review Technique (PERT) generalizes the above model by incorporating uncertainty, allowing activity durations to be random variables, producing nevertheless a relatively crude solution in planning problems. In this paper, based on the findings of the relevant literature, which strongly suggests that a Beta distribution can be employed to model earthmoving activities, we utilize Monte Carlo simulation, to estimate the project completion time distribution and measure the influence of skewness, an element inherent in activities of modern technical projects. We also extract the activity criticality index, with an ultimate goal to produce more accurate planning estimations.

Keywords: Monte Carlo Simulation, Skewness, PERT, beta distribution, project completion time distribution

Procedia PDF Downloads 11