The AIG case illustrates an important paradox that looms again in today’s European debt crisis. Like regular insurance, credit-default swaps offer a way to spread risks, and standard thinking in economics holds that “risk sharing” of this kind should make individual banks safer, and the entire banking system more stable. It isn’t true, though, at least not always. In fact, too much sharing of risks can actually create bigger problems.
This follows from a recent study by Italian physicist Stefano Battiston and colleagues (one of whom is the Columbia University economist Joseph Stiglitz, winner of the 2001 Nobel Memorial Prize in Economic Sciences). The researchers showed that too much risk sharing can make it easy for distress to spread like a virus.
Credit-Default Swap Risk Bomb Is Wired to Explode: Mark Buchanan – Bloomberg











