Decreasing then Level perpetuity question

dimanche 30 novembre 2014

The first payment of a perpetuity-immediate is 60. Subsequent payments decrease by 1 till they reach a level of k. Payments remain constant at k thereafter. The present vale of the perpetuity is equal to the present value of a perpetuity-immediate paying 44 each year. The annual effective interest rate is 5%. Calculate k



I set this up as



(Da) angle 60-k + v^60-k (k/i) = 44/i = PV



The answer sets it up as



(Da) angle 60-k + (k/i) = 44/i = PV



Why would you not discount the value of the perpetuity after time 60-k to time 0?





Decreasing then Level perpetuity question

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