ETFs are a relatively new invention, but they have caught on quickly thanks to being backed and sponsored by many of the top names in the investment industry such as Dow Jones, Merrill Lynch, Standard and Poors, and Barclays. The cutesy names appointed to ETFs, including "Spiders", "Qubes", "Diamonds", “Webs, and "Holders", do nothing to belie their power. In their simplest form, ETFs are baskets of stocks, which are designed closely track an index, sector, country, or investment style. For a while, index-oriented ETFs dominated the entire ETF realm. Now, as ETFs have become more popular, the ETF landscape has evolved to include new investment types.