Portfolio Selection (Markowitz, 1952)

paper

Wiley Online Library(peer-reviewed)·onlinelibrary.wiley.com/doi/abs/10.1111/j.1540-6261.1952....

Credibility Rating

4/5

High(4)

High quality. Established institution or organization with editorial oversight and accountability.

Rating inherited from publication venue: Wiley Online Library

Included in AI safety knowledge bases as a reference for risk-return tradeoffs and portfolio-style resource allocation frameworks; relevant to prioritization under uncertainty but not directly focused on AI safety.

Metadata

Importance: 42/100journal articleprimary source

Summary

Harry Markowitz's foundational 1952 paper introduces modern portfolio theory, establishing the mathematical framework for optimal portfolio construction by balancing expected return against variance (risk). It introduces the concept of the 'efficient frontier' and demonstrates that diversification can reduce risk without sacrificing expected returns. This work formalized the trade-off between risk and return, revolutionizing financial economics and decision-making under uncertainty.

Key Points

•Investors should optimize portfolios based on both expected return and variance (risk), not expected return alone.
•The 'efficient frontier' represents portfolios offering the highest return for a given risk level or lowest risk for a given return.
•Diversification across assets with low correlations reduces portfolio variance without proportionally reducing expected returns.
•Introduced mean-variance optimization as a formal mathematical framework for rational decision-making under uncertainty.
•Laid the groundwork for later developments including CAPM, risk-adjusted performance metrics, and quantitative finance broadly.

Cited by 1 page

Page	Type	Quality
AI Risk Portfolio Analysis	Analysis	64.0

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[The Journal of Finance](https://onlinelibrary.wiley.com/journal/15406261 "The Journal of Finance homepage")

[Volume 7, Issue 1](https://onlinelibrary.wiley.com/toc/15406261/1952/7/1) pp. 77-91 [![The Journal of Finance](https://onlinelibrary.wiley.com/pb-assets/journal-banners/15406261-1501384737817.jpg)](https://onlinelibrary.wiley.com/journal/15406261 "The Journal of Finance homepage")

Original Article

# PORTFOLIO SELECTION [\*](https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1540-6261.1952.tb01525.x\#jofi1525-note-0016)

[Harry Markowitz](https://onlinelibrary.wiley.com/authored-by/Markowitz/Harry),

Harry Markowitz

The Rand Corporation

[Search for more papers by this author](https://onlinelibrary.wiley.com/authored-by/Markowitz/Harry)

[Harry Markowitz](https://onlinelibrary.wiley.com/authored-by/Markowitz/Harry),

Harry Markowitz

The Rand Corporation

[Search for more papers by this author](https://onlinelibrary.wiley.com/authored-by/Markowitz/Harry)

First published: March 1952

[https://doi.org/10.1111/j.1540-6261.1952.tb01525.xDigital Object Identifier (DOI)](https://doi.org/10.1111/j.1540-6261.1952.tb01525.x)

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†

This paper is based on work done by the author while at the Cowles Commission for Research in Economics and with the financial assistance of the Social Science Research Council. It will be reprinted as Cowles Commission Paper, New Series, No. 60.

Markowitz, H. (1952), PORTFOLIO SELECTION\*. The Journal of Finance, 7: 77-91. [https://doi.org/10.1111/j.1540-6261.1952.tb01525.x](https://doi.org/10.1111/j.1540-6261.1952.tb01525.x)

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## Citing Literature

[![](https://onlinelibrary.wiley.com/cms/asset/0886601c-84b4-436e-a991-636fec56c21c/jofi.1952.7.issue-1.cover.jpg)](https://onlinelibrary.wiley.com/toc/15406261/1952/7/1 "View Volume 7, Issue 1")

[Volume7, Issue1](https://onlinelibrary.wiley.com/toc/15406261/1952/7/1 "View Volume 7, Issue 1")

March 1952

Pages 77-91

- [**Related**](https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1540-6261.1952.tb01525.x#pane-pcw-related)
- [**Information**](https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1540-6261.1952.tb01525.x#pane-pcw-details)

### Recommended

- [Portfolio Selection](https://onlinelibrary.wiley.com/doi/full/10.1002/9780470404324.hof002001)



[Frank J. Fabozzi PhD, CFA, CPA](https://onlinelibrary.wiley.com/authored-by/Fabozzi/Frank+J.), [Harry M. Markowitz PhD](https://onlinelibrary.wiley.com/authored-by/Markowitz/Harry+M.), [Francis Gupta PhD](https://onlinelibrary.wiley.com/authored-by/Gupta/Francis),



[Handbook of Finance, \[1\]](https://onlinelibrary.wiley.com/doi/book/10.1002/97804704

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