Found this.. Level 2 Trades When you place

Found this..

Level 2 Trades

When you place an order to buy or sell a stock, your order is placed through many different market makers and other market participants. The level II quotes will show you the best bid and ask prices from each of these participants. It shows you what people are willing to buy or sell the stock at, and whether there are any big orders at specific prices. We call this the level 2 trading books.


Each market participant is recognized by the four-letter ID that appears on level II quotes. Here are some of the most popular ones:

Four Letter ID and Market Participant Four Letter ID and Market Participant
UBSW = UBS Securities
DBAB = Deutsche Bank Alex. Brown
MLCO = Merrill Lynch
JPHQ = JPMorgan
MSCO = Morgan Stanley
GSCO = Goldman Sachs
FBCO = Credit Suisse First Boston
SBSH = Salomon Smith Barney
NITE = Knight Capital Group
ARCA = NYSE Arca Equities

When I have sold or bought anything over 2500 thru e-trade, on L2 it shows NITE, so that is why I assumed it to be E-trade - Guess it could be whoever owns the notes.. So you are probably right, but NITE seems to hold a lot of CYDY if that is the case.