Yesterday we commented on closing auction volumes, which are, of course, composed of multiple trades in a stock at the same time and price – perhaps familiar to those of you who like to combine several presents together in one piece of wrapping paper. When it comes to a single large present it is always nicer when it comes as a surprise. Away from the auctions, most institutional traders target dark pools as an efficient way to shift large positions. With no guarantee of trading, most of these dark trading venues bring the advantage of mid-point pricing. Benefits include saving half the spread as well as reducing the information leaked when interacting with a public order book.