.IF THERE is actually one iron law of money management, it is that any sort of scheme which shows up to produce major, dependable earnings is actually concealing some likewise major dangers. History is actually loaded along with examples of such money-spinners coming to be extremely prominent, only for supporters to belatedly understand that they can generate quick reductions and also consistent gains. Should that force bunches of folks to desert identical fields at once, the knock-on effects can endanger all type of additional resources, or even the financial device itself. Think of the massive bets on subprime mortgage loans that preceded the global economic situation of 2007-09. The current example is actually the Eastern yen "carry exchange", the taking a break of which has been roiling markets given that mid-July while quickly increasing the value of the yen. What is a lug exchange, and how can it unwind so strongly?