I always find these stories interesting but feel like I get lost when they get into the more arcane levels of derivatives. Here is my question; Given the experience of the Subprime mortgage debacle, and the inherent difficulty of understanding who is holding the liability of these derivatives, why doesn&#x27;t S&amp;P and Moodys just max out their credit worthiness rating at BBB. Just don&#x27;t ever let them be A rated, at any level. Would that not &quot;fix&quot; the inversion if people are mistakenly believing that counter party interest swaps are &quot;safer&quot; than Treasuries? I&#x27;m really curious about that.