Ann: Market Update - Progress Report, page-75

Jeez, I thought I'd already explained this to you -
When I say simultaneous sell/buy, I mean that there is only one person involved. With ultra high speed connectivity to the ASX, someone can issue a sell order, and a simultaneous buy order, so the sale appears on course of sales, but the shares haven't changed hands. It all happens in real time. If you don't believe me, check out a company called TIBCO - previously owned by Reuters. Check out their client base on Wall St.