Marco - thanks for your insight on VIX - the trading is quite intriguing since it is different from regular options - quick question, since it appears that some brokers put the screws to an investor with "strange' margin requirements (as in TOS and OH), selling naked puts is a bit cumbersome - would you suggest (or suggest against) going long on calls? I know they tend to be more expensive than puts, but other than that is there anything else to consider?