These days there are many companies who suffer from KIKO, OTC Derivative. KIKO is a sort of compound or exotic option. In principle currency options use to minimize the floating exchange rate in exporting companies and individuals. But KIKO was not working to do this, would rather damaged to the buyer. Furthermore buyer can not Perceived this faulties in making contract. Not to notify faulties is negligence of the seller, a bank with which buyer has an account. KIKO is a void contract, this leads to the liability of seller. Most of complex derivatives are basically gamble, and so to have too much portion of derivatives brings about bad results. Bankruptcy of Enron, Barings, Lehman Brothers etc are typical examples. In this and other serial articles I want to verify the ignorance of domestic banks and the faulties of first and shadow seller, Invest Bank like J.P Morgan who robbed enormous money in industrial countries. These are the very author of the global financial riot.