Quote from def:
skeptic,
jrwiener and carl erikson got it right. TMBR is just part of the SMART algorithm. You sent an order to sell and the system gave you the fastest fill it could find. It just so happened that TMBR was a 30 bid and the specialist didnt' fill your order at 35. If the market continued to drop, you would have been happy with the fill. You've been getting executions via TMBR for quite a while. 99/100 times you get instant fills. Thus if IB was playing games with your order, the statistics would show of many others complaining about the fills.
Have any of you tried trading into a fast moving market and got a fill from TMBR that you would not have had from the specialist? I am sure this is happening and when it does, none seems to be rushing to the boards and starting threads with the topic "IS TMBR GIVING AWAY MONEY"
In short, it works both ways - and I suspect more often than not, beneficial to the client.