An "Oil Fund" is a type of investment fund that primarily invests in oil and gas companies or related assets. These funds aim to generate returns for investors by capitalizing on the profits from oil production, refining, and distribution. They can be structured as mutual funds, exchange-traded funds (ETFs), or sovereign wealth funds, depending on their management and investment strategies. Many countries with significant oil reserves, like Norway and Saudi Arabia, have established oil funds to manage their oil revenues. These funds help stabilize the economy by saving surplus income for future generations and funding public services, infrastructure, and social programs.