As the markets change, the value of each security in your portfolio will increase or decrease at a different rate of return; changing the overall weightings of your investments. Periodic reviews of your investment portfolio help keep your retirement strategy on track.
Americans are living longer these days. That's a positive thing in theory, but from a retirement-planning standpoint, it can be challenging. After all, there's a difference between needing your retirement savings to last 20 years versus 30 years or more.