What is "Unable to compute indifference curve tangency portfolio."?
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I was playing around with the function portalloc to compute the tangency portfolio, the following error message occurred:
??? Error using ==> portalloc at 199
Unable to compute indifference curve tangency portfolio.
I have googled for this issue, but no answered so far.
Can anyone help to elaborate the cause of this error? Thanks in advance!
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Aurelien Queffurust
2011 年 9 月 6 日
it may help you to understand the error message.
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Walter Roberson
2011 年 9 月 6 日
I am not familiar with this subject area, so my interpretation might not be on the same planet as the truth, but what Bob's explanation seemed to mean to me was:
The program has calculated that the balance of assets needed to meet your targets cannot include any Risk-Free assets at all. . You should either remove the Risk-Free assets and calculate without them, or else you should keep increasing the RiskAversion parameter until importance of including some Risk-Free assets is sufficient for the calculation to balance.
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