Floating-rate securities, securities with puts, securities where, if certain things happened, a sinking fund kicked in.

FORBES: Dow Jones Interactive

Fixing the exchange rate between the dollar and euro by bureaucratic edict would be a huge mistake, like anchoring two sinking aircraft carriers together hoping the buoyancy of the two is greater than the sum of the individual compartments.

FORBES: Mundell's Dollar/Euro Fix Doesn't Fix Our Currency Mess

Yet now interest rates have gone even higher (this week the central bank raised the overnight rate from just under 30% to 32%), in order to stop the floating currency from sinking out of sight.

ECONOMIST: Still a big risk | The