Hmmmmm........Is this some IB logic used to prevent you from pennying yourself, if you're the NBBO quote on that exchange?
That said, it makes me think that this gives an "in" to those who know they'll be in the front of the order queue given a couple repeated "pennyings" on the same exchange. They can adjust and still be in front-when that is not what your order stipulated.
It's the logic that is flawed.
Say, pre-market I will pay $50.00 and put in a relative limit amount of .02. Say this tops a bid of 49.50, with an order of 49.52.
It is immediately (1 second) "pennied" by 49.53 , and my order matches it??? Great. Given no other quote movement, I'm stuck in back. Any good reason for this? I'll pay $50........not paying to sit in back of the $49.53 queue, hence the discretionary amount, all the way up to $50.00.
That said, it makes me think that this gives an "in" to those who know they'll be in the front of the order queue given a couple repeated "pennyings" on the same exchange. They can adjust and still be in front-when that is not what your order stipulated.
It's the logic that is flawed.
Say, pre-market I will pay $50.00 and put in a relative limit amount of .02. Say this tops a bid of 49.50, with an order of 49.52.
It is immediately (1 second) "pennied" by 49.53 , and my order matches it??? Great. Given no other quote movement, I'm stuck in back. Any good reason for this? I'll pay $50........not paying to sit in back of the $49.53 queue, hence the discretionary amount, all the way up to $50.00.