Chulalongkorn University Theses and Dissertations (Chula ETD)

Other Title (Parallel Title in Other Language of ETD)


Year (A.D.)


Document Type

Independent Study

First Advisor

Anirut Pisedtasalasai


Faculty of Commerce and Accountancy (คณะพาณิชยศาสตร์และการบัญชี)

Department (if any)

Department of Banking and Finance (ภาควิชาการธนาคารและการเงิน)

Degree Name

Master of Science

Degree Level

Master's Degree

Degree Discipline





The goals of this study are to examines diversification benefit when holding multiple equity funds in the portfolio for Thai market and identify the optimal number of equity funds that enough to eliminate diversifiable risk. Moreover, this study examines whether considering adding index funds in the portfolio better reduce portfolio volatility. By creating random portfolio and measure the risks by using historical return, the empirical results suggest that holding multiple funds in the mutual fund portfolio allow investor achieve diversification benefits, but in the decreasing rate. These findings are consistent with previous study of O’Neal (1997), Potter (2001) and Lhabitant and Learned (2002) for U.S. market and Brands and Gallagher (2005) for Australian market. Additionally, the result from this study suggest that holding 13-14 funds is enough to eliminate diversifiable risk for Thai active equity fund portfolio, which is slightly more than U.S and Australian market. Also, considering including index funds in the equity fund portfolio can help slightly reduce portfolio volatility more than investing in only active funds.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.