其它單純的 discount brokers 最多就是把你下的單子賣給別的交易所去成交, IB 本身即是券商,也是自己參與交易的莊家之一,尤其是股票期權上的大莊家。IB 老板是做軟件出身的,是推動市場向電子交易的先驅之一。我猜在IB下的單子很大比例都是內部被IB本身的交易軟件給 match 了,至於是不是最好價錢,說不清
Thomas Peterffy
https://en.wikipedia.org/wiki/Thomas_Peterffy
Interactive Brokers Group, Inc. (IB) is an online discount brokerage firm in the United States. The company traces its origin to 1977 when Peterffy bought a seat on the American Stock Exchange as an individual market maker, and formed T.P. & Co. the following year. IB consists of many subsidiaries operating on most major stock, futures,bonds, forex, and options exchanges worldwide.
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