By default, the Investment section of the application includes only Investment accounts. For Health Savings Accounts (HSAs) and Cash Management Accounts (CMAs), however, you may find that you wish to group these Bank accounts with your Investment accounts. This will include the account in your investment portfolio as well as any calculations and advice.
Simply click the edit icon (the pencil) next to the account in the My Accounts panel that you wish to mark as an investment, then check the "Group with investment accounts" box.
Then click the "Save" button.