The market moves. Your principal does not.

One of the most common worries I hear from retired clients is simple: what happens to my retirement money if the market falls? It is a fair worry, because this is money you no longer have the years to rebuild.

The point of an index annuity is precise. However much the market swings, your principal is protected. That floor is why it is called a zero floor: when the market drops, your original deposit does not drop with it.

When the index rises you are credited with a share of that gain, and once credited it is locked. The interest for that year is not handed back in a later downturn, and the following year is calculated on the larger balance. It compounds.

You do not capture the whole rise, though. There is a cap on how much can be credited in a year. On a policy I arranged recently the cap was 10.25%, so even if the index climbed further, the credit stopped there. That is the price of the floor.

A real example makes it clearer. A client moved $200,000 out of a matured CD into an index annuity. Running the last ten years of S&P 500 movements through it looks like this.

In a year the index rose 9.54%, that was credited in full, taking the balance to $219,080. The next year the index rose 19.42%, but with the cap only 10.25% was credited, and crucially that 10.25% applied to the grown balance of $219,080 rather than the original $200,000, bringing it to $241,536. In a year the index fell 6.24%, no interest was credited, but the balance stayed at $241,536.

Carriers typically offer five or six index options, with the S&P 500 as the default. It tracks 500 of the largest American companies and has decades of data behind it, which makes it the most dependable reference point.

To be clear about what this is: it is not a product for chasing a windfall. It grows steadily without risking the principal, and it will not keep pace with direct equity exposure in a strong year. What it does instead is let you sleep through the bad ones, and for retirement money that trade is usually the right one.

The rates and product terms in this post were current when it was written. They vary by carrier and by state and can change without notice. I will confirm what is available today when we speak.