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# interest Security

Return the interest rate for a fully invested security. Excel: INTRATE
Controller: CodeCogs

C++

## InterestSecurity

 doubleinterestSecurity( int sett int mat double investAm double redemAm Finance::Banking::YearBasis basis = yb_USA )
Returns the interest rate for a fully invested security. The function works using the following equation: where:
• rate is the interest rate for the security,
• redemption is the amount to be received at maturity,
• investment is the amount invested in the security,
• B is the number of days in the year, depending on the year
basis,
• and DIM is the number of days from settlement to maturity.

### Example 1

#include <iostream>

#include <codecogs/units/date/date.h>
#include <codecogs/units/date/dateymd.h>
#include <codecogs/finance/banking/interestsecurity.h>

int main(int argc, char *argv[])
{
int settDate=Units::Date::date(1999, 2, 15);
int maturityDate=Units::Date::date(1999, 5, 15);

double intRate=Finance::Banking::interestSecurity(settDate, maturityDate, 1000000, 1014420,
Finance::Banking::yb_Act360);

int y, m, d;
Units::Date::dateYMD(settDate, y, m, d);
printf("settlement=%i/%i/%i\n", y, m, d);

Units::Date::dateYMD(maturityDate, y, m, d);
printf("maturity=%i/%i/%i\n", y, m, d);

printf("interest rate=%f", intRate);
return 1;
}
Output:
settlement=1999/2/15
maturity=1999/5/15
interest rate=0.058328

Julian date. This is the date after issue when the security is traded to the buyer.

Julian date. The maturity date is the date when the security expires.

### Note

The day count basis is specified using the basis parameter. This basis can be any of the following: yb_USA, yb_EU, yb_Act, yb_Act360 or yb_Act365.

### Parameters

 sett The settlement date of the security, expressed as a serial mat The maturity date of the security, expressed as a serial investAm The amount invested in the security. redemAm The amount to be received at maturity. basis The day count basis to use. See YearBasis

### Returns

The interest rate for the security.

### Authors

James Warren (August 2005)
##### Source Code

Source code is available when you buy a Commercial licence.

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