As with other retirement plans, this will mostly depend on the options available to you through your custodian. Solo 401(k)s will have an array of asset exposure available to you, but it may come only in the form of mutual funds. This is not unlike many larger 401(k)s.
The way these plans are bundled as simple and straightforward products, without so many bells and whistles that they will attract the attention of the IRS, may cause them to be slightly more plain vanilla than the options available in some 401(k)s.
Regardless, you can do quite well and be invested in nearly any major asset class through even a single mutual fund family. These products, as with most 401(k)s, will be managed by the individual investor alone, more often than not, without consulting a financial professional.
These investments are meant to help the investor with long-term goals, and in such cases, without professional help, it will generally be in a person’s best interest to buy-and-hold major index funds or a specific asset allocation and try not over-think it or over-trade the account.
Of course we have useful information for you here at Tickeron, and we can also connect you with an advisor who can help further.