Day-Count Convention
Definition of 'Day-Count Convention'A system used to determine the number of days between two coupon dates, which is important in calculating accrued interest and present value when the next coupon payment is less than a full coupon period away. Each bond market has its own day-count convention. |
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Investopedia explains 'Day-Count Convention'There are several different types of day-count conventions. For example, a 30/360 day-count convention assumes there are 30 days in a month and 360 days in a year. An actual/actual day-count convention uses the actual number of days in the month and year for a given interest period.This concept might sound illogical. After all, regardless of the particular bond market there will always be 365 days in a year! Nevertheless, these conventions are standards that have developed over time and help to ensure that everybody is on an even playing field when a bond is sold between coupon dates. |
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