Jp Morgan who invented the credit swap. Latter jp Morgan got out ahead of time because they realized it was risky.
financial crisis of 2008 was fueled by the widespread use of credit default swaps (CDS), a financial instrument that played an integral role in the downfall of Lehman Brothers. CDS is a financial derivative that allows investors to protect themselves against the risk of default on a bond, loan, or other financial asset.
The reason Freddie delisted bond , maybe Freddie doesn't want to play the same old game.