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2010 | OriginalPaper | Buchkapitel

Sector Price Indexes in Financial Markets: Methodological Issues

verfasst von : Michele Costa, Luca De Angelis

Erschienen in: Price Indexes in Time and Space

Verlag: Physica-Verlag HD

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Abstract

Stock indices related to specific economic sectors play a major role in portfolio diversification. We observe some flaws in the traditional sector classification and propose a latent class approach in order to correctly classify the stock companies into homogenous groups under risk-return profile. Furthermore we provide synthetic price index numbers for each traditional and new sector by evaluating the effect of different weighting structures on the risk-return profile. We obtain new sector indices which are consistent with the standard portfolio theory and lead to an improvement of sector portfolio diversification. Our results allow to introduce a methodological dimension into both the sector definition and the sector synthesis.

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Fußnoten
1
We report Eq. (1) in a simplified form, where does not explicitly appear the probability of each traditional sector \( \pi_{c} \); the complete expression for \( \pi_{xmspc} \) is: \( \pi_{xmspc}= \pi_{c}\pi_{x|c}\pi_{m|x}\pi_{s|x}\pi_{p|x}\).
 
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Metadaten
Titel
Sector Price Indexes in Financial Markets: Methodological Issues
verfasst von
Michele Costa
Luca De Angelis
Copyright-Jahr
2010
Verlag
Physica-Verlag HD
DOI
https://doi.org/10.1007/978-3-7908-2140-6_14