List of Market Makers

CITI
ETRD
SIZE
MOKE

Anyone has a full list of market makers, and their size, relationships...

I wonder if I can say one broker has only one market maker.
if a lot of order is from the same MM, I can say it is from a single client. But what if a lot of orders keep coming from different MM, can I say just one client route those order differently? or it means more traders are in the same stock?

 

There are ALOT of market makers. Knight is huge.

http://www.knight.com/ourLiquidity/index.asp

 

Here's a list - i don't know how up to date it is:
http://www.tigernt.com/onlineDoc/MMID.html

 

You're not going to glean much from watching market makers. These days you'll see most volume trading through the ECN's.

But if you want to see who makes a market in what stock and the volume go to nasdaqtrader.com and plug in a MM or stock below.


http://www.nasdaqtrader.com/trader/tradingdata/msv/framemsv.htm

 

Here is an additional link that might be of assistance.

http://www.nasdaqtrader.com/dynamic/SymDir/mrktsym.txt

Good Luck!