FINRA Rule 5210

What firms must do:

• Firms may only publish or share information about a securities trade if they reasonably believe the trade actually occurred and was a legitimate purchase or sale.
• Firms may only publish or share bid or offer prices if they reasonably believe the quotes are genuine and reflect real buying or selling interest.
• Firms must not publish false, misleading, fictitious, or manipulative trade or quote information.
• Firms must have controls in place to prevent false reporting, fictitious quotations, manipulative quoting practices, and problematic patterns of self-trading.