During the payout phase of a variable annuity, the number of annuity units is generally fixed, yet the payment amount varies because:

解析

Once a variable annuity is annuitized, the number of annuity units credited to the annuitant is typically fixed, but each unit's dollar value moves with the separate account, so the periodic payment rises and falls with investment results. The insurer does not change payments arbitrarily, the annuitant does not reset the amount, and the rate is not locked. The variable payout reflects the fluctuating value of a fixed number of annuity units.