Class differentiation and future dollar roll settlement dates
I stumbled across this after a little research, fueled by the initial direction/guidance of Matt and Adam.
The following is a link to the 2009 SIFMA (Securities Industry and Financial Markets Association) Settlement Dates calendar:
http://www.sifma.org/services/stdforms/settlement-dates.shtml
At the top, you'll also find a brief breakdown of the the differences between Class A, B, C, and D securities.
Note that the pending pass-through of recent gains that Matt and Company have been discussing in the blog since late 2008 completely coincide with this week's Class A settlement date, set to occur on the Tuesday January 13, 2009.
Also note that the GNMA (FHA/VA) 4.5% 30YR MBS has been "trading" within the 103/32nd range, but the lowest rate most of us have seen is 4.875% on a 30-day lock. We should assume that this drop special for FHA and the pass-through for these rates also occur on their corresponding Class C settlement date, Wednesday January 21, 2009.
Although MBSLive has a decided "focus" on agency/conforming MBS bonds, these days especially, I personally am writing two FHA loans for every one FNMA loan. This information I believe is relevant, because I believe that what we are expecting to occur tomorrow or on Tuesday will be solely for conventional products, with government products not seeing the same gains and similar pass-through until a week later.