Many different types of ETFs exist in order to fulfill the various and specific needs of investors. Some can be complex while others are simple. For example, if an investor is looking to generate steady income from their ETF investment they may consider a dividend-paying ETF or bond ETF, but if they want to invest in just renewable energy they would pick an Industry or Sector ETF specific to their needs. The most common types of exchange-traded funds include Stock ETFs, Industry/Sector ETFs, Commodities ETFs and Bond ETFs, while lesser-known ETFs include Leveraged ETFs and Inverse ETFs.