El. knyga: Statistical Portfolio Estimation

"Statistical Portfolio Estimation by Taniguchi et al. is an impressive treatise on the recent developments of modern finance and statistics. This book offers a number of distinctive features, which are difficult to find in other sources. The book begins with the standard mean-variance analysis of Markowitz portfolio theory. As indicated by the authors, such standard theory is hardly optimal, however. The authors then argued that optimal theory can be built based on the highly sophisticated LAN theory developed by LeCam back in the 50s. This is the first book makes use of LAN in portfolio estimation and the authors did a superb job in explaining and motivating these important results. The second feature of the book is about multi-period investment, where multiple time series method and rank-based semiparametric theory are nicely garnered into the discussions. The third important feature of this book is its examples. The book contains illustrative examples ranging from traditional financial returns, insurance modelling, to the more recent topics such as VaR, CVaR, ES, and TCE. Further, the book also collects an extensive collection of examples about spectral envelope procedures and their applications to genome and medical sciences. Statistical Portfolio Estimation is an excellent resource for researchers of all levels, from undergraduate students to researchers and practitioners already working in finance who want to acquire a deeper understanding of statistical finance. It will be a valuable addition to the literature for years to come." Professor Ngai Hang Chan, Choh-Ming Li Chair Professor of Statistics, The Chinese University of Hong Kong, Shatin, NT, Hong Kong

"The problem of portfolio estimation has had a very large growth since the pioneering work of Markowitz and others in the 1950s. The present book by Taniguchi et al presents an up-to-date survey of these developments. It contains results and methodology that have not been easily available in book­ form before. The results are stated with rigour using precise mathematical assumptions. It also has a coverage of topics not usually included in portfolio estimation. In particular, there is a chapter running to almost 100 pages on portfolio estimation based on rank methods, where the authors dispense with distributional assumptions. Among other topics covered is the multi-period problem of portfolio analysis. Some of the more advanced mathematical and statistical tools are covered in a final chapter on theoretical foundations.

The quite sophisticated mathematical level is balanced by a chapter containing a variety of applications. The examples are not restricted to finance, but covering topics such as pension investments, micro arrays, spectral estimation of categorical time series and physiological examples. This mix of precise mathematical theory and very diverse applications, means that the book should appeal to theoretical as well as applied workers in the field. It can be highly recommended."

Dag Tjųstheim, Department of Mathematics, University of Bergen, Norway

"This book gives a very comprehensive treatment of finding optimal financial portfolios by estimating the relevant parameters from historical data. After a brief summary of the relevant background on stochastic processes and limit theorems, the book starts with an introduction to (classical) portfolio theory and diffrent notions of optimal portfolios (under the assumptions of a given known model). Immediately afterwards the estimation of such optimal portfolios based on real data is discussed starting with traditional estimators and progressing via Bayesian and factor approaches to high-dimensional problems. Still within the first main chapter this is illustrated with simulations.

The next chapters consider multiperiod problems, estimation based on rank statistics and estimation in the presence of non-Gaussian innovations and exogenous variables. All these topics are treated very comprehensively. A lot of statistical and probabilistic notions, concepts and results are needed and they are explained in detail. This makes the book self-contained in the sense that most techniques/concepts needed to understand the results presented in the book are given. In contrast to this, the authors refer quite often to the original literature for the proofs.

In Chapter 7 the theory developed is applied in detail to several numerical real data examples which are not only from finance, but also from the life sciences. Finally, in the last chapter more theoretical foundations and technical aspects of the statistical inference in the context of financial portfolio estimation are given.

While reading this book on portfolio optimization and estimating the relevant parameters one may learn a lot on many other areas of statistics (like time series analysis, local asymptotic normality, bootstrap, local stationarity, information criteria, etc.) if one is not yet familiar with these topics. On the other hand, the book covers its topic rather comprehensively and one finds a lot of di erent aspects and approaches in it."

- Robert Stelzer - Mathematical Reviews Clippings January 2019