Why it matters
Interest in an FIA is calculated using a formula with caps, participation rates, or spreads, so gains are limited. In return, the contract usually protects principal from market losses, subject to the insurer's ability to pay. FIAs often have long surrender periods and charges for early withdrawals. Dividends are not included in index returns. The SEC and NAIC both advise buyers to understand the crediting method. Terms vary by carrier and by state.
Source: investor.gov
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