# accrfrac

Fraction of coupon period before settlement

## Syntax

## Description

returns the fraction of the coupon period before settlement. `Fraction`

= accrfrac(`Settle`

,`Maturity`

)

Use `accrfrac`

for computing accrued interest.
`accrfrac`

calculates accrued interest for bonds with regular
or odd first or last coupon periods.

Required input arguments must be number of bonds,
`NUMBONDS`

-by-`1`

or
`1`

-by-`NUMBONDS`

, conforming vectors or
scalars.

returns the fraction of the coupon period before settlement with optional
inputs.`Fraction`

= accrfrac(___,`Period`

,`Basis`

,`EndMonthRule`

,`IssueDate`

,`FirstCouponDate`

,`LastCouponDate`

)

Optional input arguments must be either
`NUMBONDS`

-by-`1`

or
`1`

-by-`NUMBONDS`

conforming vectors, scalars,
or empty matrices.

## Examples

## Input Arguments

## Output Arguments

## Version History

**Introduced before R2006a**