government securities
(B) Exclusions The term “trading facility” does not include— (i) a person or group of persons solely because the person or group of persons constitutes, maintains, or provides an electronic facility or system that enables participants to negotiate the terms of and enter into bilateral transactions as a result of communications exchanged by the parties and not from interaction of multiple bids and multiple offers within a predetermined, nondiscretionary automated trade matching and execution algorithm; (ii) a government securities dealer or government securities broker, to the extent that the dealer or broker executes or trades agreements, contracts, or transactions in government securities, or assists persons in communicating about, negotiating, entering into, executing, or trading an agreement, contract, or transaction in government securities (as the terms “government securities dealer”, “government securities broker”, and “government securities” are defined in section 3(a) of the Securities Exchange Act of 1934 ( 15 U.S.C. 78c(a) )); or (iii) facilities on which bids and offers, and acceptances of bids and offers effected on the facility, are not binding. Any person, group of persons, dealer, broker, or facility described in clause (i) or (ii) is excluded from the meaning of the term “trading facility” for the purposes of this chapter without any prior specific approval, certification, or other action by the Commission.