Here's another article on the rise of Dark Pools, as a follow up to my previous post on Dec 13th. The article reports that 7-10% of daily market volume is Dark Pool transactions. That's a big number when you consider that retail trades account for an average of only 3% of daily volume. Most of the Dark Pool transactions never get reported, which makes their prolifieration even more worrisome. Some interesting tables and charts in the article if you take the time to dig in.