days360isda

Days between dates based on 360-day year (International Swap Dealer Association (ISDA) compliant)

Syntax

NumDays = days360isda(StartDate,EndDate)

Description

NumDays = days360isda(StartDate,EndDate) returns the number of days between StartDate and EndDate based on a 360-day year (that is, all months contain 30 days) and is International Swap Dealer Association (ISDA) compliant. If EndDate is earlier than StartDate, NumDays is negative. Under this convention, all months contain 30 days.

Either input argument can contain multiple values, but if so, the other must contain the same number of values or a single value that applies to all. For example, if StartDate is an n-row character array of date character vectors, then EndDate must be an N-by-1 vector of integers or a single integer. NumDays is then an N-by-1 vector of date numbers.

Examples

Determine the Number of Days Between Two Dates Given a Basis of 30/360 Based on ISDA Compliance

Determine the NumDays using date character vectors for StartDate and EndDate for the month of January.

StartDate = '1-Jan-2002';
EndDate = '1-Feb-2002';
NumDays = days360isda(StartDate, EndDate)

NumDays = 30

Determine the NumDays in the month of January using a datetime array for StartDate.

NumDays = days360isda(datetime('1-Jan-2002','Locale','en_US'), '1-Feb-2002')

NumDays = 30

Determine the NumDays using a vector for EndDate.

MoreDays = ['15-mar-2000'; '15-apr-2000'; '15-jun-2000'];
NumDays = days360isda('15-jan-2000', MoreDays)

NumDays = 3×1

    60
    90
   150

Input Arguments

StartDate — Start date

serial date number | date character vector | datetime object

Start date, specified as a scalar or an N-by-1 or 1-by-N vector using serial date numbers, date character vectors, or datetime arrays.

Data Types: double | char | datetime

EndDate — End date

serial date number | date character vector | datetime object

End date, specified as a scalar or an N-by-1 or 1-by-N vector using serial date numbers, date character vectors, or datetime arrays.

Data Types: double | char | datetime

Output Arguments

NumDays — Number of days between two dates given a basis of 30/360 based on European convention

vector

Number of days between two dates given a basis of 30/360 based on International Swap Dealer Association (ISDA) compliance, returned as a scalar or an N-by-1 or 1-by-N vector containing the number of days.

NumDays returns as a double for serial date number, date character vector, or datetime inputs for StartDate and EndDate.

References

[1] Addendum to Securities Industry Association, Standard Securities Calculation Methods: Fixed Income Securities Formulas for Analytic Measures. Vol. 2, Spring 1995.