Half-month compounding

Half-month compounding

The only unusual thing about half-month compounding is, given a starting date, deciding when the other payments fall. Here's how TValue does it:

First payment

Next payment

15th of month

Last day of month

Last day of month     

15th of month

1st through 14th

Add 15 days

16th through 30th
(not end of month)

Subtract 15 days

If a date would fall on February 29 in a non-leap year, it gets dropped back to February 28. The description above won't produce February 30.