.IF THERE is actually one iron regulation of finance, it is actually that any sort of scheme which appears to create big, reliable revenues is hiding some correspondingly big threats. Past is loaded with examples of such money-spinners ending up being hugely well-liked, merely for fans to belatedly realise that they can produce abrupt reductions along with stable increases. Must that force considerable amounts of individuals to leave similar trades immediately, the ripple effects may threaten all kind of other resources, or perhaps the economic system on its own. Think of the massive bets on subprime mortgage loans that anticipated the international monetary problems of 2007-09. The most up to date instance is the Japanese yen "carry exchange", the loosening up of which has been roiling markets given that mid-July while quickly enhancing the value of the yen. What is a lug trade, as well as how can it decipher so violently?