There’s a thing called “kitchen sinking” that was mentioned here on FR the other day.
These banks are writing off ALL subprime debt...even though most of these notes will be paid satisfactorily and will not be losses. There are several reasons for this...but what it means is that later on...when this does shake out they will show larger profits at that time than they otherwise would have.
I'm still kind of surprised that the bond rating companies like Moody's and Standard & Poor's haven't been completely discredited as a result of this whole mess (since most of these CMOs filled with bad loans were rated as investment-grade bonds by those morons).