While you can open an IRA at a bank or brokerage firm, you will have more investment options—and higher potential earnings—at the latter. Banks tend to offer very limited, low-yield investment options, such as savings accounts and certificates of deposit (CDs). These low-risk investments may appeal to some retirement savers, but they won’t allow your nest egg to grow substantially—even over the long haul. You will generally find a much broader selection of investments and greater potential growth if you open an IRA at a brokerage account.