Ann: Company appointment of new Chairman, page-185

So how does one wanting to ultimately buy decimate the price on reopen to make it plummet but then ultimately profit by buying it back.....i'm lost?? Trading is a zero sum game. Are you saying these sharks are already holders because wouldn't they just hold and then buy more if it fell and they were optimistic buyers or are you saying they will short via cfd's and then buy back in which case there is no gain? I'm just interested in learning a new technique.