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Sess0304 new - Fin3715 – Fall 07 Kayhan 1 Lecture 3-4...

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Unformatted text preview: Fin3715 – Fall 07 - Kayhan 1 Lecture 3-4: Perpetuities and Annuities Reading: RWJ Chapter 6 Outline: Compounding Frequency Perpetuities and Annuities Applications Fin3715 – Fall 07 - Kayhan 2 Compounding Frequency (Intervals) Stated Annual Interest Rate (SAR) – Interest rate that is stated in contracts using simple interest (compounding period must be given). 12% compounded quarterly = 3% per quarter 12% compounded monthly = 1% per month Examples : Loans with monthly payments (e.g. car loans and mortgages) are compounded monthly. Many bonds (e.g., US Gov’t bonds) are compounded semi-annually. Fin3715 – Fall 07 - Kayhan 3 What’s the FV of $100 invested for 2 years earning 10% compound semi-annually? Fin3715 – Fall 07 - Kayhan 4 What’s the FV of $100 invested for 2 years earning 10% compound semi-annually? 5 % 100 Period 4 3 2 1 • Period = half a year • # period per year: m = 2 • Total number of periods = m*2 = 4 • Interest rate per period: r SAR /m = 10%/2 = 5% • FV = 100 (1+5%) 4 = 121.55 Fin3715 – Fall 07 - Kayhan 5 Effective Annual Rate Effective Annual Interest Rate (EAR) – Interest rate that is annualized using compound interest. r EAR = (1 + r SAR /m) m – 1 Remark: The rate over the same period (e.g. EAR) must be used to compare rates of return between two investments with different periods (e.g., monthly versus quarterly). If m > 1, the EAR will always be greater than the SAR. Fin3715 – Fall 07 - Kayhan 6 Example 1: Effective Annual Rate Given a monthly rate of 1%, What is the Effective Annual Rate (EAR)? What is the Stated Annual Rate (SAR)? Fin3715 – Fall 07 - Kayhan 7 Example 1: Effective Annual Rate (Sol’n) EAR = (1+.01) 12- 1= 12.68% SAR = (.01) (12) = 12% Fin3715 – Fall 07 - Kayhan 8 Example 2: Effective Annual Rate You purchase a 30-year $1,000 CD today. What’s your account worth when it matures, if the interest is 10% compounded (i) annually, (ii) quarterly, (iii) monthly, (iv) daily? Fin3715 – Fall 07 - Kayhan 9 Example 2: Effective Annual Rate (Sol’n) • 1000 (1+.1) 30 = 17,449.4 • 1000 (1+.1/4) 4*30 = 19,358.1 • 1000 (1+.1/12) 12*30 = 19,837.4 • 1000 (1+.1/365) 365*30 = 20,077.3 Remark : More frequent compounding does not add much value beyond the monthly frequency. Fin3715 – Fall 07 - Kayhan 10 Example 3: Effective Annual Rate You want to invest $1,000 in a savings account for two years. After visiting three different banks, you discover the following three options: (i) 12.5% compounded annually; (ii) 11.75 % compounded monthly; (iii) 12% compounded quarterly. Which savings account should you choose? Fin3715 – Fall 07 - Kayhan 11 Example 3: Effective Annual Rate (Sol’n) (i) EAR = 12.5%; (ii) EAR = (1+.1175/12) 12 – 1 = 12.40% (iii) EAR = (1+.12/4) 4 – 1 = 12.55% Thus, choose 3 rd option. Fin3715 – Fall 07 - Kayhan 12 PV of Multiple Cash Flows 1 2 … T r % CF CF T … CF 2 CF 1 Period Remark: To calculate the PV (FV) of a stream of cash...
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This note was uploaded on 05/06/2008 for the course FIN 3715 taught by Professor Stephens during the Spring '08 term at LSU.

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Sess0304 new - Fin3715 – Fall 07 Kayhan 1 Lecture 3-4...

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