In yet another move to make a mockery of so-called market transparency, and again with mad props to Zerohedge, we have this:
Go read the entire Zerohedge article; what this means, in short, is that the ability of people (like you and I) to see the fact that a handful of banks, most specifically Goldman Sachs, constitute the majority of NYSE trading volume - and they're trading for their own book, not for customers, will no longer be disclosed.