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Portfolios Diversification in Taiwan Stocks: base on FTSE TWSE Taiwan 50 Index

摘要


Taking Markowiz's portfolio theory as the basic theory, this paper selects 20 stocks from FTSE TWSE Taiwan 50 Index and makes an empirical test using the monthly return and variance data of Taiwan stock market from 2011 to 2014. Finally, the relationship between portfolio size and portfolio risk is obtained, and it is found that when the portfolio size reaches 12, the effect of risk diversification that continues to increase the portfolio size will no longer be obvious.

參考文獻


H. Markowitz: Portfolio Selection, The Journal of Finance, Vol. 7 (1952) No.1, p.77-91.
J.L. Evans, S.H. Archer: Diversification and the Reduction of Dispersion: An Empirical Analysis,The Journal of Finance, Vol. 23 (1968) No.5, p.761-767.
J.Y. Campbell,M. Lettau,B.G. Malkiel,and Y. Xu: Have Individual Stocks Become More Volatile? An Empirical Exploration of Idiosyncratic Risk, The Journal of Finance,Vol. 56 (2001) No.1, p.1-43.
J. L.Hu, T. P. Chang and R. Y. Chou: Market Conditions and the Effect of Diversification on Mutual Fund Performance: Should Funds Be More Concentrative under Crisis?, Journal of Productivity Analysis, Vol. 41(2014) No.1, p.141-151.
M. Statman: How Many Stocks Make a Diversified Portfolio?, Journal of Financial and Quantitative Analysis,Vol. 22 (1987) No.3, p.353-363.

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