Description Usage Arguments Details Value See Also
This calculates the years between two dates using the 30/360 day basis convention. This convention assumes that months consists of 30 days and years consist of 360 calendar days.
1 | thirty_360(date1, date2)
|
date1 |
A date-time object. |
date2 |
A date-time object. |
The day count is determined after making the following (ordered) modifications:
If the start date is the 31st, set the start dates to the 30th.
If the start date greater than the 29nd and the end date is the 31st then set the end dates to the 30th.
The year fraction is then calculated as:
\frac{(d_2 - d_1) + (m_2 - m_1) \times 30 + (y_2 - y_1) \times 30}{360}
The order of date1
and date2
is not important. If date1
is less than date2
then the result will be non-negative. Otherwise,
the result will be negative.
This is also known as the bond basis.
A numeric value representing the number of years between
date1
and date2
.
Other counter methods: actual_360
,
actual_365
,
actual_actual_isda
,
is_valid_day_basis
,
thirty_360_eu_isda
,
thirty_360_eu_plus
,
thirty_360_eu
, thirty_360_us
,
year_frac
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