Date rolling


In finance, date rolling occurs when a payment day or date used to calculate accrued interest falls on a holiday, according to a given business calendar. In this case the date is moved forward or backward in time such that it falls in a business day, according with the same business calendar.
The choice of the date rolling rule is conventional. Conventional rules used in finance are:
Date rolling is particularly important for over-the-counter derivatives, whose payment and end dates may potentially fall on any date. For standardized derivatives, in order to avoid problems with month ends, the payment and termination dates are generally chosen to fall in the middle of the month, as in the IMM dates on futures and options contracts, and the similar dates on standardized credit default swaps.