The court jester would like to offer the duke a suite of ETFs. That’s right — The Motley Fool’s asset management business is prepping a line of new funds, with plans to more than triple the number of ETFs it currently provides. On Tuesday, Motley Fool Asset Management, which is owned by the personal finance publication, filed for Securities and Exchange Commission approval of  15 ETFs. Those products differ significantly from the three active and three passive ETFs in its roster, expanding into themes suc ...