For the model described in Exercise 1, the demands for information from the portfolio manager are extensive.

a) How many yield curves need to be assessed to use the proposed planning model?

b) How would you think about the problem of assessing the exogenous cash flows in such a way that they are consistent with the yield curves assessed?

c) What is the interpretation of using the same level of realized and unrealized losses on all scenarios? Which scenarios are likely to produce the binding realized and unrealized loss constraints? Can the loss constraints on the remaining scenarios be dropped?

d) Suppose that the lower-bound constraint on the holdings of government securities could be dropped from the model. How might this change in the model formulation affect the optimal solution? Could the value of the objective function decrease?