Hi mark
I believe they do trade against their own customers with their computers programmed to delay/match buy and sell orders and take the spread off both sides (in ES and MES). "Internalization". IB help desk denies this - but I know from IB that they:
1. do not use the datafeed they provide to customers when customers complain on fills
2. take it on themselves to delete your message log with them -so you can't get old messages to show what they said.
I have found they harass customers who object.
Bunch of people wearing tin foil hats here.
1. I have said it here repetitively for years and then when we sold the US operation of Timber Hill I thought it would go away but my word is just something on a message board at the end of the day. The idea that IB has been internalizing futures flow is 100% incorrect and ridiculous. The firm has been very clear on earnings calls, regulatory filings and other public means which do carry regulatory punch. The short of it is what you are saying in regards to internalization is ridiculous and false. Don't believe me here - Go read the FINRA filings and listen to earnings calls and heck, learn how to read an income statement and point me to what would be substantial earnings in this regard considering the volumes pumping through our systems. FACT: you place an order for ES and MES and they will immediately be sent to the exchange for execution w/o delay
2. Delete your message log: Tin foil hat statement again. The regulatory repercussions yet alone the technical difficulty given the number of messages passing through the system each day are enormous. FACT: brokers are required to record communications. If you are using the ticket and message system your info will be retained.
As for MF - they did not run their prop out of separate entities. Our market making has always been ring-fenced.
From our website which is about as clear as you can state it:
We manage our brokerage and market making businesses in separate companies, which are registered with local securities and/or commodities regulators. We maintain strict systematic and procedural separation between the two business lines and we do not commingle or utilize client-segregated assets for proprietary operations. Although certain affiliates of IBKR trade for their own account, our client-facing businesses do not conduct proprietary trading. We have completed the winding down of the bulk of our market making operations.
oh and before you jump on "market making". We do not make markets any longer in the US, only Asia where, like always. we do not get a look at client flow in any shape or form.
Those of you who continue to claim otherwise will not change the facts - which actually do matter.