Keoghs can hold a wide range of investments, and it will mostly depend on your plan trustee. Keogh plans have the ability to include many investment options, from stocks to bonds, certificates of deposit to cash value life insurance, and so on.
Keep in mind that Keogh Plan investments are usually determined by the financial institution at which your Keogh Plan is established. When opening a Keogh Plan, be sure to check what investment options the financial institution offers, and how much in fees and commissions they would charge for these investments. Standard ERISA rules apply, so all employees must be offered the same options.
How do I allocate my assets in retirement?
What are the Withdrawal Rules for My Keogh Plan?