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- Publisher
- Wiley
- Copyright
- 1985 The American Finance Association
- ISSN
- 0022-1082
- eISSN
- 1540-6261
- DOI
- 10.1111/j.1540-6261.1985.tb04963.x
- Publisher site
- See Article on Publisher Site
Abstract
ABSTRACT An uninformed observer using the tools of mean variance and security market line analysis to measure the performance of a portfolio manager who has superior information is unlikely to be able to make any reliable inferences. While some positive results of a very limited nature are possible, e.g., when there is a riskless asset or when information is restricted to be “security specific,” in general anything is possible. In particular, a manager with superior information can appear to the observer to be below or above the security market line and inside or outside of the mean‐variance efficient frontier, and any combination of these is possible.
Journal
The Journal of Finance – Wiley
Published: Jun 1, 1985