Recently, the Financial Industry Regulatory Authority (“FINRA”) fined Citadel Securities LLC (“Citadel”) $700,000 for violations of FINRA Rule 5320 (Prohibition Against Trading Ahead of Customer Orders) and FINRA Rule 6460 (Display of Customer Limit Orders). According to the Letter of Acceptance Waiver and Consent (the “Letter”) with the FINRA, Citadel…