The additional investments are underlying options for the "customized portfolios." We do not provide performance data for the customized portfolios and their underlying investments due to their unique structure and restrictions, though we do include the customized portfolios when we list investment options and fees.
For example, you cannot invest in only the Vanguard International Growth Fund, since there is a cap on the percentage you can allocate to it withing the customized portfolios. They're a potentially versatile tool for savvy investors. You can find additional guidance and details from the UESP site here: https://uesp.org/customized-age-based/
VP, Research & Development
This information does not constitute tax advice and is provided for informational purposes only. Please consult your tax advisor, financial advisor, local taxing authority, and/or plan provider or sponsor for more information.