In Ken's October 19 post about Series I savings bongs, he mentioned that they increase in value the first of each month. I purchased some I bonds in November (both paper and electronic) and their issue date shows up as "11/2011". However, no interest has been added to the value of the electronic bonds in my TreasuryDirect account as of December 8. When I use TD's savings bond calculator and put in my bond information, it says the "next accrual date" is not until March 2012. I must not be understanding how/when the interest is added. Can anyone provide clarification?