Is this how trading the Kospi works?... And is the danger highlighted at the end of the post a reality? 1. Buy to Open K200 using Interactive Brokers, 2. IB will lend you the KRW, which is on based the accounts ability to margin KRW. (note: maximum leverage on KRW/USD is 10%) The account will now have: (a) short KRW/USD FX position. (b) Long K200@KSE SPAN margined position. 3. Interest will be charged on the FX as followed: 4.04% on 1 - 120,000,000 3.54% on 120,000,001 - 1,200,000,000 3.04% on the amount above 1,200,000,001 4. Sell to Close K200. If trade returned profit then now have long KRW/USD FX postion. FX postion earns interest as follows: 1% on 1 - 120,000,000 1.25% on 120,000,001 + Is this all correct? I'm concerned that IB's market close price of KRW/USD is c-1.00000000. I don't have millions of Dollars in my account to margin millions of Won at a 1:1 ration! ...For me it would mean facing a margin call on any possible overnight FX position. How is it possible to carry KSE trades like this overnight ?