.IF THERE IS one iron law of money, it is actually that any kind of scheme which seems to create big, trusted incomes is concealing some correspondingly huge threats. Past history is actually packed with instances of such money-spinners ending up being extremely preferred, merely for fans to belatedly become aware that they can easily produce abrupt reductions in addition to steady gains. Ought to that require tons of folks to leave comparable trades immediately, the knock-on effects can easily intimidate all type of some others possessions, or even the monetary body itself. Think about the massive bets on subprime home loans that preceded the worldwide economic problems of 2007-09. The most up to date example is the Japanese yen "hold trade", the loosening up of which has been roiling markets given that mid-July while swiftly raising the market value of the yen. What is a lug exchange, and just how can it unwind thus strongly?