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An Iterative Approach to Ill-Conditioned Optimal Portfolio Selection

Gulliksson, Mårten; Mazur, Stepan - 2019

Covariance matrix of the asset returns plays an important role in the portfolio selection. A number of papers is focused on the case when the covariance matrix is positive definite. In this paper, we consider portfolio selection with a singular covariance matrix. We describe an iterative method...

Persistent link: https://www.econbiz.de/10012654445

Portfolio Selection with a Rank-deficient Covariance Matrix

Gulliksson, Mårten; Oleynik, Anna; Mazur, Stepan - 2021

In this paper, we consider optimal portfolio selection when the covariance matrix of the asset returns is rank-deficient. For this case, the original Markowitz' problem does not have a unique solution. The possible solutions belong to either two subspaces namely the range- or nullspace of the...

Persistent link: https://www.econbiz.de/10012654482

Inference for rank-rank regressions

Chetverikov, Denis N.; Wilhelm, Daniel - 2023

Slope coefficients in rank-rank regressions are popular measures of intergenerational mobility, for instance in regressions of a child's income rank on their parent's income rank. In this paper, we first point out that commonly used variance estimators such as the homoskedastic or robust...

Persistent link: https://www.econbiz.de/10014480485

The empirical relation between credit quality, recovery and correlation

Rösch, Daniel; Scheule, Harald - 2009

correlation. …

Persistent link: https://www.econbiz.de/10010276410

Implied basket correlation dynamics

Härdle, Wolfgang Karl; Silyakova, Elena - 2012

Equity basket correlation is an important risk factor. It characterizes the strength of linear dependence between … propose several hedging schemes based on implied correlation (IC) forecasts. Modeling IC is a challenging task both in terms … of computational burden and estimation error. First the number of correlation coefficients to be estimated would grow …

Persistent link: https://www.econbiz.de/10010318771

Optimality and diversifiability of mean variance and arbitrage pricing portfolios

Pesaran, Mohammad Hashem; Zaffaroni, Paolo - 2009

This paper investigates the limit properties of mean-variance (mv) and arbitrage pricing (ap) trading strategies using a general dynamic factor model, as the number of assets diverge to infinity. It extends the results obtained in the literature for the exact pricing case to two other cases of...

Persistent link: https://www.econbiz.de/10010276233

Social capital and the labor market

2015

Persistent link: https://www.econbiz.de/10014306504

Common influences, spillover and integration in Chinese stock markets

Weber, Enzo; Zhang, Yanqun - 2008

The Chinese stock market features an interesting history of divided market segments: domestic (A), foreigners' (B) and overseas (H). This puts forth questions of market integration as well as cross-divisional information transmission. We address these issues in a structural DCC framework, an...

Persistent link: https://www.econbiz.de/10010263757

Do survey indicators let us see the business cycle? A frequency decomposition

Dresse, Luc; Van Nieuwenhuyze, Christophe - 2008

This paper uses a frequency domain approach to gain insight into the correlation between survey indicators and year … of the correlation between survey indicators and year-on-year GDP growth at the different frequencies to explain their … overall correlation. We show that survey indicators, similar to year-on-year GDP growth, do not perfectly reflect business …

Persistent link: https://www.econbiz.de/10011506652

Estimating LGD correlation

Witzany, Jiří - 2009

The paper proposes a new method to estimate correlation of account level Basle II Loss Given Default (LGD). The … correlation determines the probability distribution of portfolio level LGD in the context of a copula model which is used to … we apply the maximum likelihood method to estimate the best correlation parameter. The method is applied and analyzed on …

Persistent link: https://www.econbiz.de/10010322333