The 30-yr treasury yield because many of the banks decided to sell (I guess 670B wasn’t enough). You would think that Treasury CDS prices and interest rates would move together in the same direction but they don’t (anybody want to calculate a correlation? I’m too lazy). We live in a messed-up world. The basic calculation is that there is a flight to quality, so people pay more for the bonds and then the flight to safety includes people insuring them.
If the US defaults on its debt, which counterparties are going to pay up on their CDS exposure? Would there really be anyone who works for the govt insisting that CDS counterparties must pay their obligations even though the US govt isn’t paying theirs?