Equity-indexed annuities are complicated products that may contain several features that can affect your return. You should fully understand how an equity-indexed annuity computes its index-linked interest rate before you buy. An insurance company may credit you with a lower return than the actual index’s gain. Some common features used to compute an equity-indexed annuity’s interest rate include:

	Participation Rates. The participation rate determines how much of the index’s increase will be used to compute the index-linked interest rate. For example, if the participation rate is 80% and the index increases 9%, the return credited to your annuity would be 7.2% (9% x 80% = 7.2%).
	Interest Rate Caps. Some equity-indexed annuities set a maximum rate of interest that the equity-indexed annuity can earn. If a contract has an upper limit, or cap, of 7% and the index linked to the annuity gained 7.2%, only 7% would be credited to the annuity.
	Margin/Spread/Administrative Fee. The index-linked interest for some annuities is determined by subtracting a percentage from any gain in the index. This fee is sometimes called the “margin,” “spread,” or “administrative fee.” In the case of an annuity with a “spread” of 3%, if the index gained 9%, the return credited to the annuity would be 6% (9% - 3% = 6%).