Question: Stephen Siegel works at the investment firm based in what city?
Sentence (from "Multilateral trading facility"): Article 4 (15) of MiFID describes MTF as multilateral system, operated by an investment firm or a market operator, which brings together multiple third-party buying and selling interests in financial instruments – in the system and in accordance with non-discretionary rules – in a way that results in a contract.
Relevant evidence: No