English  |  正體中文  |  简体中文  |  Post-Print筆數 : 27 |  Items with full text/Total items : 113303/144284 (79%)
Visitors : 50809263      Online Users : 819
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/36733


    Title: 不同風險偏好下多期投資策略之研究
    Dynamic asset allocation for long-term investors diverse risk preference
    Authors: 林佳華
    Lin, Chia-Hua
    Contributors: 張士傑
    Chang, Bill
    林佳華
    Lin, Chia-Hua
    Keywords: 利率風險
    共同基金理論
    風險中立
    interest rate risk
    mutual fund
    martingale
    Markovian processes
    exchange rate risk
    Date: 2003
    Issue Date: 2009-09-18 19:24:08 (UTC+8)
    Abstract: 對一些退休基金或是壽險基金來說,因為它們的金額都相當龐大,進而影響的層面也相當廣泛;它們影響著金融市場的發展、有價證券的價格和市場的報酬。
    所以,對現今市場投資在這樣長期資產的投資策略而言,以下我們要討論的議題將是非常重要。
    以前的退休基金管理計畫是建立在單期的假設當中。根據目前所持有所有資產的部位、目前市場的狀況與對未來報酬的期望,基金管理人將尋求對下期的最適投資決策。傳統的方法都是用期望值-變異數方式(Mean-Variance approach)去極大化投資的報酬,以求取最適部位。但是單期的期望值-變異數方式(Mean-Variance approach)面對了二個問題:
    一、 集合各個單期最適決策用多期的眼光來看不一定是最適。
    二、 單期最適決策並不能同時處理投資面與集資面的問題。例如:退休基金同時間有每月的收入與每月的投資面。
    不像單期的投資方式,使用多期的投資方法比較能符合這樣的投資問題與要求,也比較具有合理性。
    投資在長期資產的部位與報酬率,最容易受到利率變動的影響。換句話說,利率變化是影響投資在長期性資產的最大變因。因此,我們將討論的問題:在利率是隨機變動時,以Vasicek (1977)的利率模型為主,加入投資人風險偏好的共同基金的分配原則。這樣的理論下,我們將利用風險中立的方法求出最適的投資組合,以滿足在長期投資觀點下避險與套利的需求。其中投資人的風險偏好是以Merton (1973)提出的常數相關風險偏好(Constant Relative Risk Aversion;CRRA)的效用函數去討論;在文章最後,我們將針對投資人的風險偏好做一些討論,包括:改變CRRA的參數、自然對數的效用函數(Logarithmic utility function)。
    以往的研究都採用動態程式設計(Dynamic programming approach)的方法來解決這樣多期投資的問題,但是這樣的方法運用的計算相當複雜,也不一定求的出最適部位解;而利用Cox and Huang (1989)提出的風險中立方法(Martingale approach)將完全的解決以上遇到的問題。
    In this study, we investigate the dynamic mutual fund separation theorem applied to portfolio management for constant relative risk averse investors where, in particular, the interest rate risks are incorporated. Within this economy, the real interest rates and stock prices are assumed to follow the Markovian processes whose drifts and diffusion parameters are driven by certain state variables. Our approach involves the use of the martingale methodology developed by Cox and Huang (1989) as proposed in the work of Deelstra et al. (2003). Following their framework, we consider the economy of the investors that consists of cash, bond fund and stock indices. Adding to the previous works, we investigate the obtained optimal strategies through numerical examples in order to be compared to the allocations of popular advice and clarify the hedge and arbitrage demands in financial decision from long-term perspective. Finally, certain mutual funds are constructed to validate the validity of the popular advice.
    Reference: Bajeux-Besnainou, 2003. Dynamic asset allocation for stocks, bonds, and cash. Journal of Business 76, 263-287.
    Barberis, N., 2000. Investing for the long run when returns are predictable. Journal of Finance 55, 225-264.
    Breeden, D., 1979. An intertemporal asset pricing model with stochastic consumption and investment opportunities. Journal of Financial Economics 7, 265—296.
    Chang, S. C. and H. Y. Cheng. 2002. Pension valuation under uncertainty: implementation of a stochastic and dynamic monitoring system, Journal of Risk and Insurance, 69, 171-92.
    Cox, J. and Huang, C. F., 1989. Optimal consumption and portfolio policies when asset prices follow a diffusion process, Journal of Economic Theory 49, 33-83.
    Cox, J. and Huang, C. F., 1991. A variational problem arising in financial economics. Journal of Mathematical Economics 20, 465-487.
    Devolder, P., Princep, M. B., Fabian, I. D., 2003. Stochastic optimal control of annuity contracts, Insurance: Mathematics and Economics 33, 227-238.
    Deelstra, G., Grasselli, M. and Koehl, P. F., 2000. Optimal investment strategies in a CIR framework. Journal of Applied Probability 37, 936-946.
    Duffie, J. D. and Huang, C. F., 1985. Implementing Arrow-Debreu equilibria by continuous trading of few long-lived ecurities, Econometrica, 53, 1337-1356.
    El Karoui, N. and Huang, S. J., 2001. A dynamic maximum principle for the optimization of recursive utilities under constraints. Annual of Applied Probability 11,
    664—693.
    Karatzas, I., 1989. Optimization problems in the theory of continuous trading. Journal of Control and Optimization 27, 1221-1259.
    Karatzas, I. and Shreve, S., 1991. Brownian Motion and Stochastic Calculus, Seconded. Springer-Verlag, Berlin. Long, J.B., 1990. The numeraire portfolio. Journal of Financial Economics 26, 29—69.
    Merton, R. C., 1971. Optimum consumption and portfolio rules in a continuous-time case. Journal of Economy Theory 3, 373-413.
    Merton, R. C., 1969. Lifetime portfolio selection under uncertainty: The continuoustime case. Review of Economics and Statistics 51, 247—257.
    Markowitz, H., 1959, Portfolio Selection: Efficient Diversification of Investment, John Wiley, New York.
    Merton, R. C., 1971. Optimum consumption and portfolio rules in a continuous-time model. Journal of Economic Theory 3, 373—413.
    Merton, R. C., 1973. An intertemporal capital asset pricing model. Econometrica 41, 867—887.
    Pliska, S., 1986. A stochastic calculus model of continuous trading: optimal portfolios. Mathematics of Operations Research 11, 371—382.
    Description: 碩士
    國立政治大學
    風險管理與保險研究所
    91358020
    92
    Source URI: http://thesis.lib.nccu.edu.tw/record/#G0091358020
    Data Type: thesis
    Appears in Collections:[風險管理與保險學系] 學位論文

    Files in This Item:

    There are no files associated with this item.



    All items in 政大典藏 are protected by copyright, with all rights reserved.


    社群 sharing

    著作權政策宣告 Copyright Announcement
    1.本網站之數位內容為國立政治大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,惟仍請適度,合理使用本網站之內容,以尊重著作權人之權益。商業上之利用,則請先取得著作權人之授權。
    The digital content of this website is part of National Chengchi University Institutional Repository. It provides free access to academic research and public education for non-commercial use. Please utilize it in a proper and reasonable manner and respect the rights of copyright owners. For commercial use, please obtain authorization from the copyright owner in advance.

    2.本網站之製作,已盡力防止侵害著作權人之權益,如仍發現本網站之數位內容有侵害著作權人權益情事者,請權利人通知本網站維護人員(nccur@nccu.edu.tw),維護人員將立即採取移除該數位著作等補救措施。
    NCCU Institutional Repository is made to protect the interests of copyright owners. If you believe that any material on the website infringes copyright, please contact our staff(nccur@nccu.edu.tw). We will remove the work from the repository and investigate your claim.
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback