# Chapter 4: Nominal and Effective Interest Rates

Chapter 4: Nominal and Effective Interest

Rates

Session 9-10-11 Dr Abdelaziz Berrado

EGR2302-Engineering Economics

1

Al Akhawayn University

Topics to Be Covered in Today's Lecture

Section 4.1: Nominal and Effective Interest Rates statements Section 4.2: Effective Annual Interest Rates

EGR2302-Engineering Economics

2

Al Akhawayn University

Section 4.1 NOMINAL & EFFECTIVE RATES

? Review Simple Interest and Compound Interest (from Chapter 1) ? Compound Interest ?

? Interest computed on Interest ? For a given interest period

? The time standard for interest computations ? One Year ? One Year: Can be segmented into:

? 365 days ? 52 Weeks ? 12 Months ? One quarter: 3 months ? 4 quarters/year

? Interest can be computed more frequently than one time a year

EGR2302-Engineering Economics

3

Al Akhawayn University

4.1 Common Compounding Frequencies

? Interest May be computed (compounded): ? Annually ? One time a year (at the end) ? Every 6 months ? 2 times a year (semi-annual) ? Every quarter ? 4 times a year (quarterly) ? Every Month ? 12 times a year (monthly) ? Every Day ? 365 times a year (daily) ?... ? Continuous ? infinite number of compounding periods in a year.

EGR2302-Engineering Economics

4

Al Akhawayn University

4.1 Quotation of Interest Rates

? Interest rates can be quoted in more than one way. ? Example:

? Interest equals "5% per 6-months" ? Interest is "12%" (12% per what?) ? Interest is 1% per month ? "Interest is "12.5% per year, compounded monthly"

? Thus, one must "decipher" the various ways to state interest and to calculate.

EGR2302-Engineering Economics

5

Al Akhawayn University

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