I wanted to ask you if you know detailed information regarding the index that ETFs are used to replicate. I will give you an example: This ETF http://ch.ishares.com/en/pc/products/IEGZ is supposed to track the performances of the "Barclays Capital Euro Government 10-15 Year Term Index". is there any detailed description of that particular index. Some mathematical formula? I tried to look around but not much information is around. Are ETF supposed to be transparent?