Difference between revisions of "Documentation/How Tos/Calc: EFFECTIVE function"

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== EFFECTIVE ==
 
== EFFECTIVE ==
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=== Issues: ===
 
=== Issues: ===
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* According to the draft ODFF standard, this function will be replaced with a new '''EFFECT''' function.
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* The calculation assumes that interest is credited at the end of exactly equal periods. In reality, different quarter-years, for example, have different numbers of days.
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* The calculation assumes that interest is credited at the end of exactly equal periods. In reality different quarter-years, for example, have different numbers of days.
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* [[Documentation/How_Tos/Calc: EFFECT_ADD function|EFFECT_ADD]]
 
* [[Documentation/How_Tos/Calc: EFFECT_ADD function|EFFECT_ADD]]
 
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* [[Documentation/How_Tos/Calc: Derivation of Financial Formulas|Derivation of Financial Formulas]]
 
* [[Documentation/How_Tos/Calc: Derivation of Financial Formulas|Derivation of Financial Formulas]]
  
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[[Category: Documentation/Reference/Calc/Financial functions]]

Latest revision as of 10:53, 31 January 2024

EFFECTIVE

Returns the effective compounded interest rate given a nominal interest rate.

Syntax:

EFFECTIVE(nom_rate; num)

nom_rate: the nominal interest rate.
num: the number of times interest is credited / compounded during the period that nom_rate applies to.
If an investment has a nominal rate, say for a year, but interest is paid and credited say each quarter, the interest paid each quarter will itself start earning interest. This increases the effective value. This function returns the effective rate - that is, the rate that would have to be paid at the end of the (say) year to give the same return.
The formula used is:
effective_rate = (1 + nom_rate/num)num - 1

Example:

EFFECTIVE(6%; 4)

returns approximately 6.14%, which is the effective rate of an investment with a nominal rate of 6% per annum, compounded quarterly.

Issues:

  • The calculation assumes that interest is credited at the end of exactly equal periods. In reality, different quarter-years, for example, have different numbers of days.


See Also
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