Securities Law Commons^™

Manipulating Citadel: Profiting At The Expense Of Retail Stock Traders' Market Makers, Merritt B. Fox, Lawrence R. Glosten, Sue S. Guan

Faculty Scholarship

This Article considers whether securities market strategies designed to profit at the expense of so-called “internalizers” should properly be considered illegal manipulation. An internalizer acquires from a brokerage firm the right to be the market maker for the broker’s full order flow from its retail customers, promising in return to execute each order at a price slightly better than the best price available on any exchange (“price improvement”) as well as to pay the broker a fee for each executed order (“payment for order flow”). Almost all retail trading — about 29% of the country’s total share volume — is …