I couldn't see it either.
You can create a portlet to show it, NSQL section would be:
...
from inv_investments inv
and exists (select 1 from pfm_investments where portfolio_id = @NVL@(@WHERE:PARAM:XML:INTEGER:/data/id/@value@,0) and investment_id =inv.id )
Place the portlet on one of the tabs of the Portfolio page.