其它单纯的 discount brokers 最多就是把你下的单子卖给别的交易所去成交, IB 本身即是券商,也是自己参与交易的庄家之一,尤其是股票期权上的大庄家。IB 老板是做软件出身的,是推动市场向电子交易的先驱之一。我猜在IB下的单子很大比例都是内部被IB本身的交易软件给 match 了,至于是不是最好价钱,说不清
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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