After I read its prospectus, I decide not to pursue its open IPO. Another reason is I just bought some HMIN and MR: I want to limit the number of stocks I hold.
IB is a great business. I heard its name first from a friend who recommend it for its low cost and high speed in stock (options) trading. Later on I found it’s very popular among active traders. I read its prospectus (old) last Nov and was impressed by its technology; I also learned “what is market maker” from the reading. But I do have some concern: the valuation and the control share holder. It does have impressive growth though: from market making and brokerage.