The Use and Misuse of Attribution


Date: December 2005
Author: Peter Ellis

Attribution is the dominant technique performance teams at investment management companies use, in order to explain performance to both internal and external clients. But most investment management firms are not extracting as much value from attribution services as they could do, and should do.

The use of attribution is growing, in response to both internal and external pressures; pension fund clients want clearer descriptions of performance, and the portfolio managers themselves use attribution to better measure the effectiveness of their process an individual skill. Attribution has become a key business service for investment management companies.

Attribution is a technical subject and, even within performance teams at investment management firms, the understanding of attribution is generally concentrated in a small number of people. Performance teams often work in isolation when designing and implementing attribution solutions. So, it remains a mystery to non-specialists.

The internal and external demands for more detail and greater accuracy in performance attribution is driving the industry towards more sophisticated attribution services and more complex methods. Many investment management firms are struggling to cope with the challenges posed to upgrade their performance services. Unsurprisingly then, in the past five years, vendor systems have emerged that support these new models and calculation methods.

As part of this research, Investit interviewed 17 investment management companies, 10 performance system vendors and also appointed Carl Bacon, an industry-known performance expert, as a special advisor to the research project.


Table of contents

Management Summary   1
1.0 Introduction  
1.1     Scope of the research   4
1.2 Methodology   5
2.0 An Introduction to Attribution   7
2.1 Definitions of basic terms   8
2.2 Performance measurement basics   10
2.3 Attribution basics   13
2.4 Attribution models   17
2.5 Calculation methods   21
3.0 The Use of Attribution   23
3.1 The clients of attribution   24
3.2 The value delivered by attribution   27
3.3 Attribution models   30
3.4 Delivering attribution   33
3.5 The growth of complexity in attribution   35
3.6 Attribution systems   37
4.0 The Misuse of Attribution   39
4.1 Performance analysis   40
4.2 Evaluating performance   41
4.3 Explaining performance   45
4.4 The deficiencies of attribution as a performance analysis technique   48
4.5 Problems arising from dominance of attribution   50
4.6 Systems issues   52
5.0 The Attribution Landscape   55
5.1 The evolution of attribution   56
5.2 The current state of attribution   59
5.3 The future landscape   60
5.4 Business impact of enhanced performance analysis techniques   65
6.0 Attribution Best Practice   67
6.1 Best practice for using attribution in performance analysis   68
6.2 Best practice for delivering attribution   70
6.3 Best practice for upgrading attribution services   72
7.0 Conclusions   73


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