just wondering if two underlyings have the same correlation (in terms of price), do their IV's also have that same correlation? also, with: http://www.risklatte.com/volatilityToday/volatilityToday041221.php under case 3, shouldn't the buying and selling of yen leave a net balance of 2.4million yen i.e. $22,857 USD hedging profit (not the stated 7582 USD) ?