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2#
发表于 2011-7-13 14:34
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Active risk: Volatility/deviation of active return from mean active return.
Total risk: Systematic risk + unsystematic risk
I am not sure if we can classify active risk as systematic or unsystematic or both, but I believe unsystematic risk provides more opportunities for earning alphas-active return.
Hypothetical example
Assume the trustees of XYZ pension fund hires 5 managers to manage its pension fund/portfolio.
Manger A: Specialize in indexing,
Manger B: Specialize in indexing/enhance indexing,
Manger C, D, E: Active managers.
Managers A&B are managing the core portfolio, their main objective is to control and manage risk.
Active managers are responsible for generating active return (called satellites). Now, they will comparatively take more risks than the other mangers to earn alphas.
Overall, the Pension fund should experience the benefit of diversification resulting in the total fund risk being less than the total active risk. Therefore, in general investors are expected to be more risk averse when facing active risk than total risk. |
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