Index heavyweights Elf and Rhone Poulenc both ended slightly weaker while active Eurotunnel was unchanged on nearly a million shares traded .
<response> Index heavyweights <organization>Elf</organization> and <organization>Rhone Poulenc</organization> both ended slightly weaker while active <location>Eurotunnel</location> was unchanged on nearly a million shares traded . </response>