Indexed Universal Life (IUL)
Permanent coverage with index-linked cash value growth and a contractual downside floor.
IUL is the modern permanent life option. The death benefit is permanent, the premium is flexible, and the cash value account is credited based on the performance of a market index (commonly the S&P 500) rather than a fixed schedule.
The structure is built around a participation rate and a floor. In years the index is up, your cash value is credited up to a cap. In years the index is negative, the floor (typically zero percent) protects the cash value from losing ground. You participate in growth without participating in losses.
That asymmetry is what makes IUL attractive for long-horizon wealth building. Over a 20 or 30 year window, removing the downside years from the math materially improves compounded outcomes compared to direct market exposure. The trade-off is the cap on upside, which is the cost of the floor.
IUL is not a substitute for retirement accounts, but it pairs well with them. It is most useful as a tax-advantaged income source in retirement (loans against the cash value are not currently taxable income) and as a permanent death benefit that does not draw down the rest of your portfolio.