It is the “contagion,” however, that seems to be the concern. Players who have hedged their bets by betting both ways cannot collect on their winning bets; and that means they cannot afford to pay their losing bets, causing other players to also default on their bets. The dominos go down in a cascade of cross-defaults that infects the whole banking industry and jeopardizes the global pyramid scheme. The potential for this sort of nuclear reaction was what prompted billionaire investor Warren Buffett to call derivatives “weapons of financial mass destruction.” It is also why the banking system cannot let a major derivatives player—such as Bear Stearns or Lehman Brothers—go down. What is in jeopardy is the derivatives scheme itself. According to an article in The Wall Street Journal on January 20th:
Hanging in the balance is the reputation of CDS as an instrument for hedgers and speculators—a $32.4 trillion market as of June last year; the value that may be assigned to sovereign debt, and $2.9 trillion of sovereign CDS, if the protection isn't seen as reliable in eliciting payouts; as well as the impact a messy Greek default could have on the global banking system.
http://www.commondreams.org/view/2012/02/20
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