If your annuity’s interest rate is tied to the value of a stock or other equity index, it is appropriately called an equity-indexed annuity. You’re probably already familiar with one of the most commonly used indices, the S&P 500. These special annuities can be valuable asset investment and allocation tools when used properly. This brief crash course on how your particular annuity can help you financially will clarify the ins and outs of how to receive the maximum amount of return on your capital.