ETFs replicate indexes and such indexes have varying investment criteria, such as minimum or maximum market capitalization of each holding. For example, the S&P 500 Index only contains large- and mid-cap stocks, so any ETF that tracks this index will not contain small-capitalization stocks. Others such as iShares Russell 2000 Index replicate an index composed only of small-cap stocks. There are many style ETFs such as iShares Russell 1000 Growth and iShares Russell 1000 Value. The iShares Select Dividend ETF replicates an index of high dividend paying stocks. Other indexes, on which ETFs are based, focus on a specific industry, such as banks or technology, or specific niche areas, such as sustainable energy or environmental, social and corporate governance. They can also focus on stocks in one country or be global.