Indices are usually refered to with their price index. But there are also other version, such as NET, and GROSS. The difference being how dividends and taxes are accounted for. You can see the different version in the list below:
- Price: What you will read about in the daily news.
- Gross: Also called the 'total return' accounts for dividends but not tax.
- Net: Also called the 'total net return', this accounts for dividends and witholding tax.
Since witholding tax can depend on country to country and if they have double tax treaties or not we chose to use the gross version to make comparisons.