I feel your pain!Is "modified following" that DavidJN writes about the same? I think for bonds they use 30/360 convention or similar. Don't ask me to explain more, though. There was one moment in my life when I had to figure this out. Now i just want to un-know it (-:
514,000,000 - 67,000,000 = 447,000,000. That's not a few!This is not like that little Brexit joke to which our sponsor is so committed. That only screwed a few million people.
I once did some consultancy work for a Stranglers support act.