That high yield savings account is (likely) unavailable to their tax-advantaged account(s) such as 401k. In that case, their choices may be limited to stocks or bonds.
You can hold CDs in an IRA; currently Navy Federal is offering a 5-Year CD at 3.50% APY available for IRAs with no maximum purchase amount. [1]
Earlier this year I opened up an IRA with them and I put $100 in a 3.680% APY 40 months CD. I did this because they were matching the first $100 on new IRAs, so I deposited $100 and they deposited $100.
Earlier this year I opened up an IRA with them and I put $100 in a 3.680% APY 40 months CD. I did this because they were matching the first $100 on new IRAs, so I deposited $100 and they deposited $100.
[1] https://www.navyfederal.org/products-services/checking-savin...