Yes and the bit about &#x27;predatory HFT&#x27; is backed up with an article which has no information about what constitutes &#x27;predatory HFT&#x27;, it merely repeats the words in a small annotion.  The article is more about the regulatory concerns over dark pools.<p>I&#x27;ll tell you why they use dark pools.  On the open market, if you sell lots of shares, buyers will see that, and drop their bids.  Likewise if you put in a large bid, sellers will raise their asks. In a dark pool, institutions can move large blocks at a given price without market forces interfering, and reduce trading costs.