This case gives the student an opportunity to compute the holding period return (HPR) for several investment vehicles. The student must recognize that the risk of a particular investment will affect the assessment of its actual performance. To this end, the student is required to use Jensen's measure (alpha), which uses portfolio beta to measure risk and the CAPM to adjust for market return, and then draw conclusions.
Total current income? ($0.90 ? 400) ? ($92.50 ? 8) ? ($1.10 ? 500) ? $0
? 360 ? 740 ? 550
? $1,650
Total capital gain? ($1.50 ? 400) ? (-$6.25 ? 8) ? ($0.57 ? 500) ? $3,000
? $3,835
HPR (portfolio)?
JM? (rp - RF) - [bp ? (rm - RF)]
? (10.89 - 7.20) - [1.2 ? (10.10 - 7.20)]
? 3.69 - (1.20 ? 2.90) ? 3.69 - 3.48 ? 0.21
Using Jensen's measure, the actual portfolio return is better than the required return because it is positive. It is reasonable to use this measure, which uses the portfolio's beta, to evaluate a four-vehicle portfolio.
This question should lead to discussion—it has no “pat” answer. In general, the portfolio is balanced between current income and growth. The ratio of current income to capital gain is 43 ($1,650/$3,835); one might wish to discuss whether or not this is satisfactory. The returns on each of the investment vehicles appear acceptable; the ones that might require investigation are the bonds and the mutual fund. They have lower before-tax returns than the S&P 500 Stock Composite Index, but they may be somewhat less risky. Probably, the most obvious recommendation is to monitor the portfolio rather than change it at this time.
Evaluating Formula Plans: Charles Spruge's Approach
This case allows students to use a simplified portfolio to evaluate the four formula plans presented in the text. For ease in computation and discussion, we have assumed that fractional shares can be purchased. Instructors may wish to revise the numbers to eliminate fractional shares.