Unrealised interest calulation (excl first day incl lastday)

In TS, the default is to exclude the first day and include the last day when calculating interest, which is the most common market practice. There is a system setting if you want to change this default. If the system setting is changed the default will effect accrued interest in report and when running unrealised interest for all interest bearing instrument. 

If only one or a few counterparties are calculating with the setting include first day and exclude last it is possible to verify this by changeing the setting in reports only.

This setting only affects unrealised interest and not the actual payment of interest. 

The setting exclude last day will give 1 more day see example below.