Hello from Spain, I hope your apology, but my english is really very limited. It will become better, I expect. The question: In your opinion, which is the most liquid option market, and underlying, in the world? In Europe we have dax and eurostoxx index options that works pretty good. In USA I have some experience with mini-sp future options. It was satisfactory too. What about gold or crude oil options? And currencies futures options in the globex? I'll pay attention to your answers. Thank you.