haha
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
I checked BLS data for the CPI-U non seasonally adjusted data. This is referred to as Bloomberg CPURNSA (CPI Urban Non seasonally adjusted I think). I went and double checked vs. bloomberg's CPURNSA and it gives the same CPI-U NSA numbers as BLS.
There is a 4 month lag between CPI data and the rate that applies. From the prospectus: "For example, for the Interest Period from and including February 15, 2006to and including March 14, 2006, CPIt will be the CPI for November 2005 and CPIt-12 will be the CPI for November 2004." So Nov 05 CPI correlates to March 15 2006 interest rates. Hence Jan 2009 CPI correlates to May 15, 2009 interest rates (and payment).
I just checked my April OSM interest payment and it is correct to the penny at $0.0444 per sh. This is 0.0914% interest for CPI plus 2.00% fixed over 31 days.
May 2009 OSM payment should be $0.04171 per sh. That is 2.03% interest over 30 days.
To the poster that was a tiny bit off each time when comparing calculated vs. actual ISM/OSM payments - double check that you are using daily accrual instead of interest rate divided by 12. They apparently accrue interest daily on these, so periods with 30 days pay a tiny bit less than 31 day periods. And the mid-month payment is tricky - May payment includes the end of April, so the May payment period is only 30 days (in spite of May having 31 days).
Anyone want to give SLM investor relations dept a call on hehalf of the ER forum class of ISM/OSM holders? Just ask them where da money is at.
So do you use a 360 day year, or 365 day to get the correct factor?
Ha