Five methods of performance appraisal in their ex post (historical) forms include: Jensen Alpha, Treynor Measure, Sharpe ratio, M^2 and Information ratio. I've memorized all the formulas and can do all the calculations accurately but don't know how to interpret the results. I know Jensen and Treynor use beta (systematic risk) in the formula whereas Sharpe and IR use standard deviation (total risk) in the formula but again how do you compare and translate the results. Can someone explain it in a plain language?作者: Windjammer 时间: 2011-7-11 19:45
You just said it - Jensen and Treynor use beta and are measures of systematic risk while Sharpe and M2 are measures of total risk. What you want to look is for divergence between the first two and the second two, which tells you whom is taking what kind of risk.作者: Roflnadal 时间: 2011-7-11 19:45
Also, from what I remember from a few practice exams, Jenson and Treynor are good measures if they asset is being added to an already diversified portfolio. If not being added to a diversified portfolio, standard deviation will be a better risk measure than beta and Sharpe would be a better risk measure.作者: mp3bu 时间: 2011-7-11 19:45
probably also important to note that if the m2 measure is greater than the market return, the portfolio will plot above the cml.
i've seen the diversification issue with treynor come up a few times now. if you're assessing the performance of a diversified portfolio, sharpe is more appropriate because diversified portfolio assumes all non-systemic risk has been diversified away. on the other hand, if you're evaluating a small or non-diversifed, portfolio, treynor is the better metric because it takes into account specific risk (non-systemic).作者: Zestt 时间: 2011-7-11 19:45
ridgefield Wrote:
-------------------------------------------------------
> probably also important to note that if the m2
> measure is greater than the market return, the
> portfolio will plot above the cml.
>
> i've seen the diversification issue with treynor
> come up a few times now. if you're assessing the
> performance of a diversified portfolio, sharpe is
> more appropriate because diversified portfolio
> assumes all non-systemic risk has been diversified
> away. on the other hand, if you're evaluating a
> small or non-diversifed, portfolio, treynor is the
> better metric because it takes into account
> specific risk (non-systemic).
