Lit vs Dark Pool: The distinction between marketplaces that display pre-trade quotes publicly (lit) and those that do not (dark).

Lit vs Dark Pool

The distinction between marketplaces that display pre-trade quotes publicly (lit) and those that do not (dark).

Definition

A lit (or transparent) marketplace publicly displays pre-trade bids and offers, allowing all market participants to see available liquidity before they trade. Canadian exchanges such as the TSX and NEO Exchange are lit. A dark pool (or dark marketplace) does not display pre-trade quotes; orders are matched anonymously at prices within or at the NBBO without revealing size or intent to the broader market. Dark trading in Canada is governed by NI 21-101 and UMIR 6.4 (dark liquidity rules), which require that any order executed on a dark marketplace must receive a price improvement of at least one trading increment over the best displayed price on a lit marketplace, or the trade must occur at the NBBO midpoint. The purpose of the price-improvement requirement is to prevent dark pools from simply matching orders at displayed prices without contributing to price discovery. Dark pools are appropriate for large institutional orders where pre-trade transparency could cause adverse price impact.

Source

NI 21-101; UMIR 6.4; CIRO guidance on dark liquidity (2012, revised periodically)

Where this shows up on the CIRE

Outcome 7.1
Outcome 7.2

Test yourself

Two real CIRE-bank questions on this exact outcome. Click to reveal the answer and the rule citation.

1
A client submits a written complaint alleging that a registrant recommended an unsuitable investment that caused a $15,000 loss. Under CIRO's complaint-handling requirements, which of the following is the dealer member's obligation?
Outcome 7.1 · click for answer
A.The dealer member must refer the client immediately to OBSI without conducting any internal review.
B.The dealer member must acknowledge receipt of the complaint, conduct an investigation, and provide the client with a substantive response within the prescribed time frame set out in CIRO rules.Correct
C.The dealer member may decline to investigate because the client signed a risk disclosure document at account opening.
D.The dealer member must only respond if the claimed loss exceeds a minimum dollar threshold established by CIRO.
CIRO's complaint-handling rules require dealer members to have documented procedures for acknowledging, investigating, and responding to client complaints within prescribed time frames. The firm must provide a substantive response explaining its findings and, where applicable, inform the client of their right to escalate to an independent dispute resolution service such as OBSI. Signing a risk disclosure document does not waive complaint rights, and there is no minimum dollar threshold that exempts a firm from responding.
2
OBSI (the Ombudsman for Banking Services and Investments) provides dispute resolution services to retail investors in Canada. Which of the following statements correctly describes OBSI's authority?
Outcome 7.2 · click for answer
A.OBSI can issue binding arbitration awards that force dealer members to pay compensation up to a fixed maximum.
B.OBSI investigates complaints and makes non-binding recommendations for compensation; it cannot compel a firm to pay but can publicly name non-compliant firms.Correct
C.OBSI has the same enforcement powers as CIRO and can revoke a registrant's approval.
D.OBSI only accepts complaints referred directly by CIRO and does not accept complaints initiated by clients.
OBSI operates as a free, independent dispute resolution service for banking and investment complaints. Its recommendations are non-binding: firms are not legally compelled to comply, but OBSI publishes the names of firms that decline to follow recommendations, creating reputational and regulatory consequences. OBSI does not have SRO enforcement powers and cannot revoke registrations. Retail clients may bring eligible complaints directly to OBSI after completing the firm's internal complaint process.

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