166 Optimizing Optimization
Figure 7.6 shows one of five possible performance descriptions.
Notice the pattern of the risk – return framework. On the left, risk is mea-
sure as standard deviation. On the right, it is downside risk. In each case, it is
adjusted for a term we call the style beta (see Appendix).
Figure 7.5 Efficient frontier for the upside potential ratio.
DTR α Graphic representation
Upside
potential
α
α
α
8
4
Downside risk
12
Figure 7.6 Two views of performance measurement.