Since Credit Default Swaps Can Be Used to Take Down Banks, They Can Be a Financial Weapon of Mass Destruction

Icelandic banks had no difficulties as long as international liquidity was ample and they could easily renew their short-term foreign-denominated debts. In early 2006, however, problems in the interbank market surfaced, in what would later be called the “Geyser crisis.” Price inflation increased and the króna depreciated as foreign money started getting nervous about the sustainability of the Icelandic boom. . . .

A vicious spiral may set in. Rising spreads indicate the market’s distrust of the banks, spurring even further demand for insurance, leading to even higher spreads on the debt, and so on, until the distrust in the bank reaches a point where the bank cannot receive further funding and it fails. Due to this self-reinforcing spiral of distrust and rising bank funding costs, reputable investors, commentators, and economists (most notably Warren Buffet), have called CDS [Credit Default Swaps]  instruments weapons of mass destruction. Indeed, CDSs can be used to take banks down by lowering the confidence in them. Yet they can only work if banks are vulnerable; that is, if they violate the golden rule of banking and mismatch maturities, or they mismatch currencies, or they do both. Only then will the distrust translate into funding problems that threaten the bank’s liquidity and eventually its solvency. When the bank matches maturities and currencies and holds 100 percent reserves to cover its deposits, the distrust may lead to a loss of consumers as some depositors do not continue rolling their funding over; that is, they withdraw their deposits. This, however, will not take down the bank, as no liquidity loss will result. Only a mismatch makes the banks vulnerable to this type of failure.

—Philipp Bagus and David Howden, Deep Freeze: Iceland's Economic Collapse (Auburn, AL: Ludwig von Mises Institute, 2011), 73-74.