Roncalli, Thierry and Weisang, Guillaume (2008): Tracking problems, hedge fund replication and alternative beta.
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As hedge fund replication based on factor models has encountered growing interest among professionals and academics, and despite the launch of numerous products (indexes and mutual funds) in the past year, it faced many critics. In this paper, we consider three of the main critiques, namely the lack of reactivity of hedge fund replication and its deficiency in capturing tactical allocations; its failure to apprehend non-linear positions of the underlying hedge fund industry and higher moments of hedge fund returns; and, finally, the lack of access to the alpha of hedge funds. To address these problems, we consider hedge fund replication as a general tracking problem which may be solved by means of Bayesian filters. Using the linear Gaussian model as a basis for discussion, we provide the reader with an intuition for the inner tenets of the Kalman filter and illustrate the results' sensitivity to the algorithm specification choices. This part of the paper includes considerations on the type of strategies which can be replicated, as well as the problem of selecting factors. We then apply more advanced Bayesian filters' algorithms, known as particle filters, to capture the non-normality and non-linearities documented on hedge fund returns. Finally, we address the problem of accessing the pure alpha by proposing a core/satellite approach of alternative investments between high-liquid alternative beta and less liquid investments.
|Item Type:||MPRA Paper|
|Original Title:||Tracking problems, hedge fund replication and alternative beta|
|Keywords:||tracking problem; hedge fund replication; alternative beta; global tactical asset allocation; Bayes filter; Kalman filter; particle filter; numerical algorithms (SIS, GPP, SIR and RPF); skewness; kurtosis; non-linear exposure; alpha|
|Subjects:||G - Financial Economics > G1 - General Financial Markets > G11 - Portfolio Choice; Investment Decisions
C - Mathematical and Quantitative Methods > C6 - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling > C60 - General
|Depositing User:||Thierry Roncalli|
|Date Deposited:||14. Mar 2012 23:07|
|Last Modified:||11. Feb 2013 16:35|
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