Enhancing utility and diversifying model risk in a portfolio optimization framework
First Claim
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1. A method comprising:
- a. determining an initial efficient portfolio of financial products selected by an optimization process from an available set of financial products;
b. determining an alternate portfolio that is more diverse than the initial efficient portfolio by searching one or more dimensions of an error space proximate to or surrounding the initial efficient portfolio for a more diverse portfolio of financial products from the available set of financial products;
c. calculating a cost associated with the alternate portfolio by determining the difference between a characteristic of the initial efficient portfolio and a corresponding characteristic of the alternate portfolio; and
d. selecting the alternate portfolio if the cost is less than or equal to a predetermined diversity budget.
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Abstract
A portfolio optimization process that diversifies model risk by favoring a more diversified portfolio over other portfolios with similar characteristics is provided. According to one aspect of the present invention, an intelligent search is performed for a diverse portfolio that meets a predetermined diversity budget. An initial portfolio is determined based upon an available set of financial products. The cost associated with more diversified portfolios compared to the initial portfolio is considered and one of the more diversified portfolios is selected that has an associated cost that is less than or equal to the predetermined diversity budget.
135 Citations
42 Claims
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1. A method comprising:
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a. determining an initial efficient portfolio of financial products selected by an optimization process from an available set of financial products; b. determining an alternate portfolio that is more diverse than the initial efficient portfolio by searching one or more dimensions of an error space proximate to or surrounding the initial efficient portfolio for a more diverse portfolio of financial products from the available set of financial products; c. calculating a cost associated with the alternate portfolio by determining the difference between a characteristic of the initial efficient portfolio and a corresponding characteristic of the alternate portfolio; and d. selecting the alternate portfolio if the cost is less than or equal to a predetermined diversity budget. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method comprising:
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a. a step for determining an initial efficient portfolio of financial products selected by an optimization process from an available set of financial products; b. a step for determining an alternate portfolio that is more diverse than the initial efficient portfolio by searching one or more dimensions of an error space proximate to or surrounding the initial efficient portfolio for a more diverse portfolio of financial products from the available set of financial products; c. a step for calculating a cost associated with the alternate portfolio by determining the difference between a characteristic of the initial efficient portfolio and a corresponding characteristic of the alternate portfolio; and d. a step for selecting the alternate portfolio if the cost is less than or equal to a predetermined diversity budget. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A computer-readable medium having stored thereon instructions, which when executed by one or more processors cause a method to be performed comprising:
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a. determining an initial efficient portfolio of financial products selected by an optimization process from an available set of financial products; b. determining an alternate portfolio that is more diverse than the initial efficient portfolio by searching one or more dimensions of an error space proximate to or surrounding the initial efficient portfolio for a more diverse portfolio of financial products from the available set of financial products; c. calculating a cost associated with the alternate portfolio by determining the difference between a characteristic of the initial efficient portfolio and a corresponding characteristic of the alternate portfolio; and d. selecting the alternate portfolio if the cost is less than or equal to a predetermined diversity budget. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification