CT1 level annuities chapter 6 page 20

Discussion in 'CT1' started by Zafrulah, Mar 9, 2018.

  1. Zafrulah

    Zafrulah Member

    Hello, This is my first time on this forum. I am learning CT1 right now. Could somebody explain me the meaning of this equation and how we come to know that these two equal each other. Thank you
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  2. John Lee

    John Lee ActEd Tutor Staff Member

    Suppose you are working in years. The first annuity says you are receiving a payment of 1 per time unit payable in p instalments for n time units at interest rate i. For example it might be £1 per year payable in 12 monthly instalments at 10% pa for 8 years.

    The second annuity says you are receiving a payment of 1/p per time unit for n time units payable once per unit for np units at interest rate i(p)/p. For example it might be £1/12 per month payable once per month for 12*8=84 months at 2.1384...% per month.

    They are both equivalent - just one is working in years whereas the other is in months.
     

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