$500K account size and 500K shares/month, what is the lowest commission I can get other than Interactive Brokers?
I'm not being sarcastic but you really should just started calling every broker and then tell the next broker you call about the "best offer" you've gotten so far to see if the next broker you call is willing to beat it.
That is not their rate. They charge 35 mils for the first 300K then 20 mils after. You pay each tier. And it's not true that no one can beat them. Institutional brokers don't advertise their rates but they can offer whatever they want. 1245