Page 9, Example, Chapter 9

Discussion in 'CT1' started by n_stu, Apr 11, 2008.

  1. n_stu

    n_stu Member

    Hi,

    Can someone please explain why the expression for the prospective solution, for the loan outstanding after the second payment, is given as follows for the example question in page 9 Chapter 9?

    Prospectively Solution:
    12,759.16 v@8% ( 1 + a2@12%)

    I think a2@12% refers to the loan outstanding after the third payment. But I am not sure about the other expression.

    Thank you very much for your help.

    Example Question:
    A loan of 50,000 is repayable by equal annual payments at the end of each of the next 5yrs. Interest is 8% pa for the first 3 yrs and 12% pa thereafter.

    Calculate the loan outstanding immediately after the second repayment.
     
  2. n_stu

    n_stu Member

    Hi,

    I attempted the example question and the solution I found was

    outstanding loan prospectively:

    12,563.16 (a2@12% + v^2@12%) = 12,563.16 x (1.69 + 0.797) = 31,735.31

    But the solution provided by the book is

    12,563.16 v@8%(1 + a2@12%) = 12,759.16 x 0.9259 x 2.6901 = 31,781

    I do not understand the solution in the study material and why the two answers are different. Could someone please enlighten me? Thank you for your help.
     
  3. John Lee

    John Lee ActEd Tutor Staff Member

    Well the two expressions are different so naturally they're not going to give the same answer!

    Yours values two payments (in 1 year and 2 years) in the annuity and then another payment in 2 years all at 12%. But the payment in 1 year should be 8%. Also you have two payments in two years and none in 3 years.
     
  4. n_stu

    n_stu Member

    Hi John Lee

    Thank you for your help.
     
  5. John Lee

    John Lee ActEd Tutor Staff Member

    No problem! :)
     
  6. dhvanil

    dhvanil Member

    Loan Sechedule

    plz explain me how both solution came .
    i.e Page 9 example by prospectively & retrospectively method.
     
  7. Hobbs

    Hobbs Member

    Bonus points for the 5-year necro. :)

    Prospective: The PV of future loan repayments.
    (1 12k payment + the pv of 2 subsequent payments at 12%)discounted by one year at 8%.

    Retrospective: The Accumulated inital loan value - the accumulated loan payments.
    So 50k indexed for 2 years at 8% - 1 repayment indexed by 8% - 1 repayment which has happened directly before the valuation.
     

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