ECONM2030 Investment Management 2021
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ECONM2030
Investment Management
2021
Question 1
You wish to assess the historical risk-adjusted performance of a managed portfolio. The initial investment occurred at the end of May 2013 . Data on subsequent portfolio values and cash injections or withdrawals appear in the table below:
Date |
Portfolio value (£’000s) |
Net Cash Flow (£’000) |
31 May ‘13 |
800 |
0 |
31 May ‘14 |
939.5 |
50 |
31 May ‘15 |
1150 |
- 100 |
31 May ‘16 |
1275 |
60 |
31 May ‘17 |
1400 |
0 |
31 May ‘18 |
1569 |
|
(Assume the fund was valued on the dates given and the cash injections and withdrawals occurred immediately afterwards.)
a. From the data, calculate the yearly time-weighted geometric average returns on the managed portfolio (using 2-digit decimal precision). Briefly compare the averages.
(20 marks)
b. The returns on the market proxy (RM,t) and on the risk-free asset (Rf,t) over the same period are given in the table below.
Year ending |
RM,t (%) |
Rf,t (%) |
31 May ‘14 |
12 |
2 |
31 May ‘15 |
8 |
2.5 |
31 May ‘16 |
15 |
3 |
31 May ‘17 |
7 |
2.5 |
31 May ‘18 |
9 |
2.5 |
c. Using these data and your results from part (a), answer the following:
i. Calculate the beta of the managed portfolio, then assess the portfolio's performance over the 5-year period using the Sharpe and the Treynor measures. Interpret your results and illustrate them graphically either in the exam book or using graph paper.
(50 marks)
ii. Using the results in part (i) above, infer the values of Jensen's and M2 that the portfolio achieves using the fact that they can be algebraically related to the Sharpe and Treynor measures, respectively. Interpret all results . For example, are the measures consistent and would you expect them to be?
(30 marks) Total: 100 marks
Question 2
The success of active investment strategies is predicated on investor stock-picking or selectivity skills. In an essay, compare and contrast three ways to identify such skills:
• Jensen’s Alpha (1968)
• Fama’s (1972) “pure selectivity skills”
• The Information Ratio
In your essay, discuss how the measures are related and whether they complement one another or may disagree . Discuss which of the measures could be easiest to estimate empirically.
(Use mathematical expressions and graphical depiction as you see fit.)
Total 100 marks
Question 3
A fund manager summarizes the data received from security analysts and macro-forecasters in the following tables:
Asset |
E(R) (%) |
Beta |
Residual s.d. (%) |
A |
27 |
0.8 |
59 |
B |
12 |
1.2 |
69 |
C |
11 |
0.5 |
62 |
D |
9 |
0.6 |
54 |
Asset |
E(R) (%) |
s.d. (%) |
Gov’t Bonds |
6 |
0 |
Passive portfolio |
12 |
20 |
Using the data above:
a) Construct the optimal portfolio according to the model of Black and Treynor (1973), briefly explaining each of the key steps and interpreting each result. Critically discuss the features of the overall strategy that the model generates. (Be careful to only perform calculations that are strictly required for the derivation of the optimal portfolio.)
(60 marks)
b) Assess the improvement in expected performance over the pure passive strategy that results from implementing the strategy above. Use both the Sharpe ratio and an M-squared statistic to justify and interpret your results.
(20 marks)
c) Graphically show that investing in the optimal portfolio dominates investing in the passive portfolio alone. (This will require a few more calculations. Ignore the active portfolio. Again, keep to what’s strictly necessary to answer the question.)
(15 marks)
d) What final implementation step not addressed within the Black and Treynor model, should an investor conduct after they have identified the optimal portfolio?
(5 marks) Total 100 marks
Question 4
a. Consider the following data on the performance of an actively managed portfolio P, computed from monthly data over the previous 10 years (return and standard deviation figures are annualised):
|
Mean Return |
St. Dev. |
Desired Beta |
Actual Beta |
Portfolio P |
25% |
20% |
0.6 |
1.5 |
Market |
20% |
10% |
|
1.0 |
Based on these data, use Fama (1972)’s model of performance decomposition to identify different skills in the management of the portfolio. Interpret each numerical result and provide graphical illustration.
[35 marks]
b. The theory and empirical tests from academic finance research are often interpreted as overwhelmingly concluding that passive investing is optimal.
In an essay, carefully discuss the extent to which this view of academic finance is an over-simplification of the evidence. Your essay should contain a discussion of:
• The paradox of full efficiency
• The limits to the power of data-based tests of fund performance (even if they suggest that passive is best)
• The inclusion of the results of empirical research that does not conclude that passive is best, i.e. results are consistent with genuine skills in at least a subset of the population of fund managers.
[65 marks] Total: 100 marks
2022-05-20