Final answer:
Senior consumers in the context of annuity investments are typically those aged 65 and above, which is also the age when eligibility for U.S. federal benefits begins.
Step-by-step explanation:
With regard to annuity investments by seniors, "senior consumers" are typically defined as those individuals who are age 65 and above. This is based on the common definition of elderly in the United States, where the government classifies people aged sixty-five years old as elderly, signaling eligibility for federal benefits such as Social Security and Medicare.
In the U.S., there are distinctive life-stage subgroups among the older population: the young-old (approximately sixty-five to seventy-four years old), the middle-old (ages seventy-five to eighty-four years old), and the old-old (over age eighty-five). While the AARP begins offering membership to individuals at age fifty, for purposes of financial planning and government benefits, including annuities, the benchmark tends to be 65.