Updates share moves, adds comments from Jefferies
** Shares of Domino's Pizza Enterprises DMP.AX slump as much as 26.5% at A$14.8, to hit its lowest since mid-December 2013
** Stock is among the top losers on the ASX200 benchmark index .AXJO, which is up 0.6%
** The Australian pizza chain's group chief executive officer and managing director, Mark van Dyck, to step down at the end of the year
** Current chairman Jack Cowin would take on the role of executive chair on an interim basis, adds co
** Jefferies believes today's stock move will be remembered as a buying opportunity
** Sees opportunities for significant cost reductions despite industry conditions being tough
** Brokerage says cost reductions should improve economics and position the business for an eventual demand recovery
** Stock last down 18.2% takes YTD losses to 44.1%
(Reporting by Sherin Sunny and Kumar Tanishk in Bengaluru)
((Sherin.Sunny@thomsonreuters.com;))