MIT 15 053 - Study Notes (22 pages)

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Study Notes



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Study Notes

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Lecture Notes


Pages:
22
School:
Massachusetts Institute of Technology
Course:
15 053 - Optimization Methods in Management Science

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A System for Bank Portfolio Planning 14 Commercial banks and to a lesser degree other financial institutions have substantial holdings of various types of federal state and local government bonds At the beginning of 1974 approximately twenty five percent of the assets of commercial banks were held in these types of securities Banks hold bonds for a variety of reasons Basically bonds provide banks with a liquidity buffer against fluctuations in demand for funds in the rest of the bank generate needed taxable income satisfy certain legal requirements tied to specific types of deposits and make up a substantial part of the bank s investments that are low risk in the eyes of the bank examiners In this chapter we present a stochastic programming model to aid the investment portfolio manager in his planning The model does not focus on the day to day operational decisions of bond trading but rather on the strategic and tactical questions underlying a successful management policy over time In the hierarchical framework presented in Chapter 5 the model is generally used for tactical planning with certain of its constraints specified outside the model by general bank policy the output of the model then provides guidelines for the operational aspects of daily bond trading The model presented here is a large scale linear program under uncertainty The solution procedure employs the decomposition approach presented in Chapter 12 while the solution of the resulting subproblems can be carried out by dynamicprogramming as developed in Chapter 11 The presentation does not require knowledge of stochastic programming in general but illustrates one particular aspect of this discipline that of scenario planning The model is tested by managing a hypothetical portfolio of municipal bonds within the environment of historical interest rates 14 1 OVERVIEW OF PORTFOLIO PLANNING The bond portfolio management problem can be viewed as a multiperiod decision problem under uncertainty in which



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