The STOXX Sector indices are available for global markets as well as for Europe, the Eurozone and Eastern Europe. Using the market standard ICB Industry Classification Benchmark, companies are categorised according to their primary source of revenue. This categorisation guarantees a professional and accurate classification of companies in their respective business environments. There are four levels of classification ranging from broad to very detailed: 10 industries are broken down into 19 supersectors, 41 sectors and 114 subsectors.