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Defined Terms:
NI 21-101 section 1.1 – “order”
NI 21-101 section 1.4 – Interpretation -- “security”
UMIR section 1.1 – “Access Person”, “Basis Order”, “best ask price”, “best bid price”, “better price”, “Call Market Order”, ”Closing Price Order”, “Dark Order”, ”Market-on-Close Order”, “Market Regulator”, “marketplace”, “Opening Order”, “Participant”, “standard trading unit” and “Volume-Weighted Average Price Order”
UMIR section 1.2(2) – “trade”
Regulatory History:
On April 13, 2012, the applicable securities commissions approved an amendment, effective October 15, 2012, to add section 6.6.
Effective July 30, 2015, the applicable securities commission approved an amendment to subsection 6.6(2). See IIROC Notice 15‑0168 – “Dark Order Price Improvement Obligations When Trading Against an Odd-Lot Order” (July 30, 2015).
Effective February 4, 2020, the applicable securities commission approved amendments to subsection 6.6 (1). See IIROC Notice 19‑0134 – “Amendments Respecting Provision of Price Improvement by a Dark Order” (August 8, 2019).
Effective December 22, 2025, the applicable securities commissions approved amendments to Rule 6.6 to accommodate the introduction of a “Contingent Derivative Order”. See CIRO Bulletin 25-0314 - “Amendments Respecting Contingent Derivative Orders” (November 20, 2025).
Effective January 13, 2026, the applicable securities commissions approved amendments to Rule 6.6 to accommodate the introduction of a “Net Asset Value Order”. See CIRO Bulletin 25-0200 - “Amendments Respecting Net Asset Value Orders and Intentional Crosses” (July 17, 2025).
A Participant or Access Person shall not enter an order for the purchase or sale of a security on a marketplace if:
Defined Terms:
NI 21-101 section 1.1 – “order”
NI 21-101 section 1.4 – Interpretation -- “security”
UMIR section 1.1 – “Access Person”, “consolidated market display”, “Dark Order”, “Market Regulator”, “marketplace”, “Participant” and “standard trading unit”
Regulatory History:
On April 13, 2012, the applicable securities commissions approved an amendment, effective October 15, 2012, to add section 6.5.
In accordance with section 6.1 of the Trading Rules, each marketplace shall set requirements in respect of the hours of trading to be observed by marketplace participants. Occasions may arise when a Participant may wish to make an agreement to trade as principal with a Canadian account, or to arrange a trade between a Canadian account and a non-Canadian account, outside of the trading hours of any marketplace that trades the particular security.
Rule 6.4 states that all trades must be executed on a marketplace unless otherwise exempted from this requirement. Participants are reminded of the exemption in clause (2)(d) of Rule 6.4 that permits a trade on a foreign organized regulated market. Participants are also reminded of the exemption in clause (2)(e) of Rule 6.4 that permits them to trade as principal with non-Canadian accounts off of a marketplace provided that any unwinding trade with a Canadian account is made in accordance with Rule 6.4.
A Participant may make an agreement to trade in a listed security or a quoted security with a Canadian account as principal or as agent outside of the trading hours of marketplaces, however, such agreements must be made conditional on execution of the trade on a marketplace or on a foreign organized regulated market. There is no trade until such time as there is an execution on a marketplace or a foreign organized regulated market or the trade is otherwise completed in accordance with one of the exemptions set out in Rule 6.4. The trade on a marketplace is to be done at or immediately following the opening of the marketplace on which the order is entered. A Participant may cross the trade at the agreed-upon price provided that the normal Requirements on order displacement are followed. If the Participant determines that the condition of recording the agreement to trade on a marketplace or foreign organized regulated market cannot be met, the agreement to trade shall be cancelled. Use of an error account to preserve the transaction is prohibited.
The Market Regulator considers that any use by a Participant of another person that is not subject to Rule 6.4 in order to make a trade off of a marketplace (other than as permitted by one of the exemptions) to be a violation of clause (a) of subsection (2) of Rule 2.1 respecting specific unacceptable activities.
Although certain affiliated entities of a Participant, including their foreign affiliates, are not directly subject to Requirements, Rule 6.4 means that a Participant may not transfer an order to a foreign affiliate, or book a trade through a foreign affiliate, and execute the order in a manner that does not comply with Rule 6.4. In other words, an order directed to a foreign affiliate by the Participant or any other person subject to Rule 6.4 shall be executed on a marketplace unless one of the exemptions set out in Rule 6.4 applies. Foreign branch offices of a Participant are not separate from the Participant and as such are subject to Requirements.
Clause (2)(e) of Rule 6.4 permits a Participant to trade off of a marketplace either as principal with a non-Canadian account or as agent for the purchaser and seller both of whom are non-Canadian accounts. A "non-Canadian account" is defined as an account of a client of the Participant or a client of an affiliated entity of the Participant held by a Participant or an affiliated entity of a Participant and the client is considered to be a non-resident for the purposes of the Income Tax Act (Canada). There may be certain situations arising where a Participant is uncertain whether a particular account is a "non-Canadian account" for the purpose of this exemption. In these situations the account should be treated as a “Canadian account”. The fact that an individual may be located temporarily outside of Canada, that a foreign location is used to place the order or as the address for settlement or confirmation of the trade does not alter the account's status as a Canadian account. Trades made by or on behalf of bona fide foreign subsidiaries of Canadian institutions are considered to be non-Canadian accounts, if the order is placed by the foreign subsidiary.
For the purpose of this Policy, the relevant client of the Participant is the person to whom the order is confirmed.
Clause (2)(e) of Rule 6.4 requires a Participant to report to a marketplace any trade in a listed security or a quoted security that is made as principal with a non-Canadian account or as agent if both the purchaser and seller are non-Canadian accounts, unless the trade is reported to a foreign organized regulated market. If such an “outside Canada” trade has not been reported to a foreign organized regulated market, a Participant shall report such trade to a marketplace no later than the close of business on the next trading day. The report shall identify the security, volume, price (in the currency of the trade and in Canadian dollars) and time of the trade.
Under Rule 6.4, a Participant, when acting as principal or agent, may not trade nor participate in a trade in a security by means other than the entry of an order on a marketplace except in accordance with an exemption specifically enumerated within Rule 6.4. For the purposes of UMIR, a “marketplace” is defined as an Exchange, QTRS or an ATS and a “Participant” is defined essentially as a dealer registered in accordance with securities legislation of any jurisdiction and who is a member of an Exchange, a user of a QTRS or a subscriber to an ATS. If a person is a Participant, certain provisions of UMIR will apply to every order handled by that Participant even if the order is entered or executed on a marketplace that has not adopted UMIR as its market integrity rules or if the order is executed over-the-counter. In particular, the following provisions of UMIR and the Corporation Rules will apply to an order handled by a Participant notwithstanding that the order is not entered on a marketplace that has adopted UMIR:
In accordance with Rule 11.9, UMIR will not apply to an order that is entered or executed on a marketplace in accordance with the Marketplace Rules of that marketplace as adopted in accordance with Part 7 of the Trading Rules or if the order is entered and executed on a marketplace or otherwise in accordance with the rules of an applicable regulation services provider or in accordance with the terms of an exemption from the application of the Trading Rules.
If a trade is to be executed on a foreign organized regulated market in a foreign currency, the foreign trade price shall be converted to Canadian dollars using the exchange rate the Participant would have applied in respect of a trade of similar size on a foreign organized regulated market in that foreign jurisdiction in order to determine whether the condition in subsection (3) of Rule 6.4 restricting avoidance of Part 6 of the Trading Rules has been met. The Market Regulator regards a difference of one trading increment or less as "marginal" because the difference would be attributable to currency conversion. A Participant shall maintain with the record of the order the exchange rate used for the purpose of determining whether a better priced order existed on a marketplace and such information shall be provided to the Market Regulator upon request in such form and manner as may be reasonably required by the Market Regulator in accordance with subsection (3) of Rule 10.11.
Defined Terms:
NI 14-101 section 1.1(3) – “foreign jurisdiction”, “issuer bid”, “securities legislation” and “take-over bid”
NI 21-101 section 1.1 - “ATS”, “marketplace participant”, “member”, “order”, “regulation services provider”, “subscriber” and “user”
NI 21-101 section 1.3(1) – Interpretation -- “affiliated entity”
NI 21-101 section 1.4 – Interpretation -- “security”
UMIR section 1.1 – “Canadian account”, “client order”, “Exchange”, “foreign organized regulated market”, “intentional cross”, “listed security”, “Market Regulator”, “marketplace”, “Marketplace Rules”, “non-Canadian account”, “Participant”, “pre-arranged trade”, “quoted security”, “QTRS”, “related entity”, “Requirements”, “standard trading unit”, “trading day”, “trading increment”, “Trading Rules” and “UMIR”
UMIR section 1.2(2) – “person” and “trade”
Related Provisions:
UMIR section 2.1 and 4.1, UMIR Part 5, UMIR sections 6.1, 9.1, 10.11 and 11.9.
Regulatory History: Effective May 16, 2008, the applicable securities commissions approved amendments to Rule 6.4 and Policy 6.4 to replace clauses (d) and (e) of Rule 6.4, add clause (i), and replace Policy 6.4. See Market Integrity Notice 2008‑008 – “Provisions Respecting “Off‑Marketplace Trades” (May 16, 2008).
Effective February 1, 2011, the applicable securities commissions approved amendments to Rule 6.4, including the introduction of subsections (1) and (2) and the addition of subsection (3). See IIROC Notice 11‑0036 – “Provisions Respecting the Implementation of the Order Protection Rule” (January 28, 2011).
Effective December 9, 2013, the applicable securities commissions approved amendments to the French version of UMIR. See IIROC Notice 13‑0294 – Notice of Approval and Implementation – “Amendments to the French version of UMIR” (December 9, 2013).
Effective September 1, 2016, the applicable securities commissions approved amendments to Part 2 and Part 5 of Policy 6.4. See IIROC Notice 16‑0122 – “Implementation of the consolidated IIROC Enforcement, Examination and Approval Rules” (June 9, 2016).
Effective January 2, 2018, the applicable securities commission approved amendments to Part 5 of Policy 6.4. See IIROC Notice 17‑0137 – “Amendments Respecting Best Execution” (July 6, 2017).
Effective November 7, 2018, the applicable securities commissions approved amendments to Rule 6.4 to add clause (j). See IIROC Notice 18‑0154 – “Amendments Respecting the Reporting of Certain Trades to Acceptable Foreign Trade Reporting Facilities” (August 9, 2018).
Effective December 31, 2021, the applicable securities commissions approved housekeeping amendments to replace rule references to the Dealer Member Rules with provisions of the IIROC Rules. See IIROC Notice 20-0042 – Rules Notice – Notice of Approval – UMIR – Housekeeping amendments to UMIR Following Implementation of IIROC Rules (March 5, 2020).
Effective March 1, 2023, the applicable securities commissions approved amendments to UMIR 6.4(2)(k) to allow Participants to trade a listed security off-marketplace during a statutory resale restriction where the trading is permitted pursuant to a prospectus exemption. See Notice 22-0185 – “Amendments Respecting the Codification of Certain UMIR Exemptions” (December 1, 2022).
Effective July 27, 2023, the applicable securities commissions approved housekeeping amendments to UMIR to correct inaccurate referencing and typographical mistakes and to ensure consistency between the English and French versions of UMIR. See CIRO Bulletin 23-0107 - "Housekeeping Amendments to UMIR" (July 27, 2023).
Rule 6.3 requires a Participant to immediately enter client orders for the purchase or sale of 50 standard trading units or less on a marketplace. This requirement is subject to certain exceptions. The Participant may withhold the order based on a determination that market conditions were such that immediate entry of the order would not be in the best interests of the client. If the order is withhold the Participant must guarantee that the client receives a price at least as good as the price the client would have received had the client order been executed on receipt by the Participant. If the order is executed against a principal order or non-client order the client must receive a better price.
Pursuant to Rule 6.3, a Participant may withhold entry of the order and return the order to its source for confirmation of its terms. For example, a Participant who receives an order to sell a security at $3 in a stock trading at $20 may return the order to the branch, as it is likely that either the price or the stock symbol is wrong.
A Participant does not have to immediately enter a client order on a marketplace if the client has requested that the order be withheld (for example, the client does not want the order executed in the open market but wishes to do a tax-related trade with their spouse). Any request must be specific to that order. A client cannot give a blanket request to withhold any future orders the client may give the Participant. Furthermore, the Participant may not solicit a request to withhold the order. A Participant must keep a record of the client’s request to withhold orders for seven years from the date of the instruction and, for the first two years, the request must be kept in a readily accessible location.
Defined Terms:
NI 21-101 section 1.1 – “order”
NI 21-101 section 1.4 – Interpretation -- “security”
UMIR section 1.1 – “Basis Order”, “better price”, “Call Market Order”, “client order”, “Closing Price Order”, “Exchange”, ”Market-on-Close Order”, “marketplace”, “Marketplace Operation Instrument”, “Marketplace Rules”, “non-client order”, “Opening Order”, “Participant”, “principal order”, “QTRS”, “Special Terms Order”, “standard trading unit” and “Volume-Weighted Average Price Order”
UMIR section 1.2(2) – “trade”
Related Provision:
UMIR section 1.2(3) - Interpretation
Regulatory History:
Effective April 8, 2005, the applicable securities commissions approved an amendment to clause (h) of subsection (1) of Rule 6.3 to add subclause (vi). See Market Integrity Notice 2005‑010 – “Provisions Respecting a “Basis Order” (April 8, 2005).
Effective March 9, 2007, the applicable securities commissions approved an amendment to subsection (1) of Rule 6.3 to add the phrase “that displays orders in accordance with Part 7 of the Marketplace Operation Instrument” after the first occurrence of the word “marketplace” and to amend clause (h) to add subclause (vii). See Market Integrity Notice 2007‑002 – “Provisions Respecting Competitive Marketplace” (February 26, 2007).
On April 13, 2012, the applicable securities commissions approved amendments to subsection (1) of Rule 6.3, effective October 15, 2012, to add the phrase “for display” after the word “enter”, to clause (e) of subsection (1) to add the phrase “on a marketplace” after the word “order” and to subsection (2) to add the phrase “on a marketplace” before the word “based”. See IIROC Notice 12‑0131 – “Provisions Respecting the Execution and Reporting of Certain “Off-Marketplace” Trades” (April 13, 2012).
Effective December 9, 2013, the applicable securities commissions approved amendments to the French version of UMIR. See IIROC Notice 13-0294 – Notice of Approval and Implementation – “Amendments to the French version of UMIR” (December 9, 2013).
Effective December 22, 2025, the applicable securities commissions approved amendments to Rule 6.3 to accommodate the introduction of a “Contingent Derivative Order”. See CIRO Bulletin 25-0314 - "Amendments Respecting Contingent Derivative Orders" (November 20, 2025).
Effective January 13, 2026, the applicable securities commissions approved amendments to Rule 6.3 to accommodate the introduction of a “Net Asset Value Order”. See CIRO Bulletin 25-0200 - “Amendments Respecting Net Asset Value Orders and Intentional Crosses” (July 17, 2025).
Defined Terms:
NI 21-101 section 1.1 – “order”
NI 21-101 section 1.4 – Interpretation -- “security”
NI 23-101 section 1.1 – “directed-action order”
NI 31-103 section 1.1 – “investment dealer”
UMIR section 1.1 – “Access Person”, “Basis Order”, “bypass order”, “bundled order”, “Call Market Order”, ”Closing Price Order”, “consolidated market display”, “derivative”, “derivatives market maker”, “derivative-related cross”, “direct electronic access”, “Exchange”, “foreign dealer equivalent”, “identified order execution only client”, “Global Legal Entity Identifier System”, “insider”, “intentional cross”, “internal cross”, “jitney order”, “Legal Entity Identifier”, “listed derivative”, “listed security”, ”Market-on-Close Order”, “Market Regulator”, “marketplace”, “multiple client order”, “non-client order”, “Opening Order”, “Participant”, “principal order”, “Program Trade”, “routing arrangement”, “short-marking exempt order”, “short sale”, “significant shareholder”, “Special Terms Order”, “Trading Rules” and “Volume-Weighted Average Price Order”
UMIR section 1.2 – “person”
Related Provision:
UMIR sections 7.13, 10.15
Regulatory History:
Effective April 8, 2005, the applicable securities commissions approved an amendment to require marking of Basis Orders. See Market Integrity Notice 2005-010 – “Provisions Respecting a “Basis Order”” (April 8, 2005).
Effective March 9, 2007, the applicable securities commissions approved an amendment to require marking of a Closing Price Order. See Market Integrity Notice 2007‑002 – “Provisions Respecting Competitive Marketplaces” (February 26, 2007).
On May 16, 2008, the applicable securities commissions approved an amendment to require marking of a bypass order. The implementation date of this amendment was determined by the IIROC Board of Directors to be June 1, 2009. See Market Integrity Notice 2008‑008 – “Provisions Respecting “Off-Marketplace” Trades” (May 16, 2008) and see IIROC Notice 09‑0034 – “Implementation Date for the Marking of Bypass Orders” (February 3, 2009).
Effective February 1, 2011, the applicable securities commissions approved an amendment to require marking of a directed action order. See IIROC Notice 11‑0036 – “Provisions Respecting the Implementation of the Order Protection Rule” (January 28, 2011).
On April 13, 2012, the applicable securities commissions approved amendments to section 6.2, effective October 15, 2012, to replace the short sale language (that referenced price restrictions) with short sale and short-marking exempt order marker requirements. See IIROC Notice 12‑0078 – “Provisions Respecting Regulation of Short Sales and Failed Trades” (March 2, 2012).
On July 4, 2013, the applicable securities commissions approved amendments to section 6.2, effective March 1, 2014, to add identifier requirements for direct electronic access clients and routing arrangements. See IIROC Notice 13‑0184 – "Provisions Respecting Third-Party Electronic Access to Marketplaces" issued July 4, 2013.
On November 13, 2014, the applicable securities commissions approved amendments to 6.2, effective June 1, 2015, to require an identifier if the order requires an identifier under Dealer Member Rule 3200. See IIROC Notice 14‑0263 – “Provisions Respecting Order Execution Services as a Form of Third-Party Electronic Access to Marketplaces” (November 13, 2014).
On February 3, 2017, the applicable securities commissions approved amendments to section 6.2, effective September 14, 2017. See IIROC Notice 17‑0039 – Notice of Approval – “Amendments Respecting Designations and Identifiers” (February 16, 2017).
Effective July 26, 2021, the applicable securities commissions approved amendments to sections 1.1, 6.2, 7.13 and 10.15 to add identifier and/or designation requirements for clients on orders sent to a marketplace. See IIROC Notice 19-0071 – “Amendments Respecting Client Identifiers” (April 18, 2019).
Effective December 31, 2021, the applicable securities commissions approved housekeeping amendments to replace rule references to the Dealer Member Rules with provisions of the IIROC Rules. See IIROC Notice 21-0236 – Rules Notice – Notice of Approval – UMIR – "Housekeeping amendments to UMIR 6.2 to update reference to IIROC Rules" (December 16, 2021).
Effective December 14, 2022, the applicable securities commissions approved amendments to UMIR 6.2 to add designations and identifiers applicable to trading in a listed derivative. See IIROC Notice 22-0140 – “Amendments Respecting the Trading of Derivatives on a Marketplace” (September 15, 2022).
Effective December 22, 2025, the applicable securities commissions approved amendments to Rule 6.2 to accommodate the introduction of a “Contingent Derivative Order”. See CIRO Bulletin 25-0314 - “Amendments Respecting Contingent Derivative Orders” (November 20, 2025).
Effective January 13, 2026, the applicable securities commissions approved amendments to Rule 6.2 to accommodate the introduction of a “Net Asset Value Order”. See CIRO Bulletin 25-0200 - “Amendments Respecting Net Asset Value Orders and Intentional Crosses” (July 17, 2025).
Defined Terms:
NI 14-101 section 1.1(3) – “securities legislation” and “securities regulatory authority”
NI 21-101 section 1.1 – “ATS” and “order”
NI 21-101 section 1.4 – Interpretation -- “security”
UMIR section 1.1 – “derivative”, “Exchange”, ‘foreign organized regulated market”, “listed derivative”, “listed security”, “Market Regulator”, “marketplace”, “Marketplace Rules”, “Participant”, “quoted security”, “QTRS”, “related derivative”, “related security”
UMIR section 1.2(2) – “trade”
Regulatory History:
Effective August 27, 2004, the applicable securities commissions approved an amendment to subsection (1) to delete the phase “entered on a marketplace or” immediately prior to the word “executed”. See Market Integrity Notice 2004‑022 – “Order Entry During a Regulatory Halt” (August 27, 2004).
Effective May 16, 2008, the applicable securities commissions approved an amendment to subsection (4) to replace the phrase “an exchange or organized regulated market outside of Canada that publicly disseminates details of trades executed on that market” with “a foreign organized regulated market”. See Market Integrity Notice 2008‑008 – “Provisions Respecting ‘Off-Marketplace’ Trades” (May 16, 2008).
Effective December 14, 2022, the applicable securities commissions approved amendments to UMIR 9.1. See IIROC Notice 22-0140 – “Amendments Respecting the Trading of Derivatives on a Marketplace” (September 15, 2022).
Effective March 1, 2023, the applicable securities commissions approved amendments to UMIR 9.1(4)(b) to allow Participants to sell a listed security on a foreign organized regulated market during a regulatory halt where a cease trade order is in effect and the selling is permitted pursuant to the conditions in the CTO. See Notice 22-0185 – “Amendments Respecting the Codification of Certain UMIR Exemptions” (December 1, 2022).
No order to purchase or sell a security shall be entered to trade on a marketplace at a price that includes a fraction or a part of a cent other than an increment of one-half of one cent in respect of an order with a price of less than $0.50.
Each order to purchase or sell a listed security or a quoted security entered to trade on a marketplace shall be subject to any special rule or direction issued by the Exchange on which the security is listed or by the QTRS on which the security is quoted with respect to:
Notwithstanding subsection (1), an intentional cross may be entered on a marketplace at a price which is a fraction of a trading increment provided the execution price is a better price for both the order to purchase and the order to sell.
(4)-(6) Repealed and moved to Rules 3.2 and 3.4
A Participant shall not enter an order on a marketplace or permit an order to be transmitted to a marketplace containing the identifier of the Participant unless the order has been:
An Access Person shall not enter an order on a marketplace or permit an order to be transmitted to a marketplace containing the identifier of the Access Person unless the order is:
A marketplace shall not allow an order to be entered on the marketplace unless:
An order may execute at such price increment as established by the marketplace for the execution of such orders and the marketplace shall report the execution price to the information processor and information vendor provided, if required by the information processor or information vendor, the marketplace shall report the price at which the trade was executed as the nearest trading increment and if the price results in one-half of a trading increment the price shall be rounded up to the next trading increment.
Defined Terms:
NI 14-101 section 1.1(3) – “securities legislation”
NI 21-101 section 1.1 – “information processor” and “order”
NI 21-101 section 1.4 – Interpretation -- “security”
UMIR section 1.1 – “Access Person”, “better price”, “client order”, ”direct electronic access”, “Exchange”, “failed trade”, “intentional cross”, “listed security”, “Market Regulator”, “marketplace”, “Marketplace Trading Obligations”, “non-client order”, “order execution service”, “Participant”, “Pre-Borrow Security”, “QTRS”, “quoted security”, “routing arrangement”, “short sale” and “trading increment”
UMIR section 1.2(2) – “trade”
Related Provision:
UMIR section 10.15
Regulatory History:
Effective March 9, 2007, the applicable securities commissions approved an amendment to subsection (1) of Rule 6.1 to add the phrase “in respect of an order with a price of less than $0.50” at the end of the subsection and to add Part 1 of Policy 6.1. See Market Integrity Notice 2007‑002 – “Provisions Respecting Competitive Marketplaces” (February 26, 2007).
On March 2, 2012, the applicable securities commissions approved an amendment to section 6.1, effective October 15, 2012, to add a new subsection (3). See IIROC Notice 12‑0078 – “Provisions Respecting Regulation of Short Sales and Failed Trades” (March 2, 2012). Effective March 1, 2014, this subsection is renumbered subsection (6) and subsections (7)-(9) relating to third-party electronic access to marketplaces are added. See IIROC Notice 13‑0184 “Provisions Respecting Third-Party Electronic Access to Marketplaces” (July 4, 2013).
On April 13, 2012, the applicable securities commissions approved amendments to section 6.1, effective October 10, 2012, to add subsections (3), (4) and (5). See IIROC Notice 12‑0130 – “Provisions Respecting Dark Liquidity” (April 13, 2012).
On April 13, 2012, the applicable securities commissions approved an amendment to Policy 6.1, effective October 10, 2012, to repeal and replace Part 1. See IIROC Notice 12‑0130 – “Provisions Respecting Dark Liquidity” (April 13, 2012). Prior to that effective date, Part 1 provided:
Notwithstanding that all orders for a security at a price of $0.50 or more must be entered on a marketplace at a price that does not include a fraction or a part of a cent, an order which is entered on a marketplace as a Basis Order, Call Market Order or a Volume-Weighted Average Price Order may execute at such price increment as established by the marketplace for the execution of such orders provided, unless otherwise permitted by the information processor or information vendor, that the marketplace shall report the price at which the trade was executed to the information processor or an information vendor as the nearest trading increment and if the price results in one-half of a trading increment the price shall be rounded up to the next trading increment.
On July 4, 2013, the applicable securities commissions approved amendments to section 6.1, effective March 1, 2014, to add subsections (7), (8) and (9) and to renumber former subsection 6.1(3) as 6.1(6). See IIROC Notice 13‑0184 - “Provisions Respecting Third-Party Electronic Access to Marketplaces” (July 4, 2013).
On November 15, 2024, the applicable securities commissions approved amendments to UMIR to add a new positive requirement to have, prior to order entry, a reasonable expectation to settle on settlement date any order that upon execution would be a short sale, as well as related supervisory and gatekeeper requirements. See CIRO Bulletin 24-0349 – “Amendments Respecting the Reasonable Expectation to Settle a Short Sale” (December 5, 2024).
Rule 5.3 restricts a Participant and its employees from trading in the same securities as a client of the Participant. The restriction is designed to minimize the conflict of interest that occurs when a Participant or its employee compete with the firm’s clients for execution of orders. The Rule governs:
The application of the rule can be quite complex given the diversity of professional trading operations in many firms, which can include such activities as block facilitation, market making, derivative and arbitrage trading. In addition, firms may withhold particular client orders in order to obtain for the client a better execution than the client would have received if the order had been entered directly on a marketplace. Each firm must analyze its own operations, identify risk areas and adopt compliance procedures tailored to its particular situation.
A Participant has overriding agency responsibilities to its clients and cannot use technical compliance with the rule to establish fulfillment of its obligations if the Participant has not otherwise acted reasonably and diligently to obtain best execution of its client orders.
A Participant can never intentionally trade ahead of a client order that is either a market order or tradeable limit order received prior to the entry of the principal order or non-client order except in accordance with an exemption from the requirements of Rule 5.3(1), which exemptions include obtaining the specific consent of the client. Examples of "intentional trades” include, but are not limited to:
The Participant must have reasonable procedures in place to ensure that information concerning client orders is not used improperly within the firm. These procedures will vary from firm to firm and no one procedure will work for all firms. If a firm does not have reasonable procedures in place, it cannot rely on the exceptions. Reference should be made to Policy 7.1 – Policy on Trading Supervision Obligations, and in particular Part 4 – Specific Procedures Respecting Client Priority.
If a client has instructed a Participant to withhold an order or has granted a Participant discretion with respect to the entry of an order, details of the instruction or grant of discretion must be retained for a period of seven years from the date of the instruction or grant of discretion and, for the first two years, the consent must be kept in a readily accessible location.
A Participant does not have to provide priority to a client order if the client specifically consents to the Participant trading alongside or ahead of the client. The consent of the client must be specific to a particular order and details of the agreement with the client must be noted on the order ticket. A client cannot give a blanket form of consent to permit the Participant to trade alongside or ahead of any future orders the client may give the Participant.
If the client order is part of a pre-arranged trade that is to be completed at a price below the best bid price or above the best ask price as indicated on a consolidated market display, the Participant will be under an obligation to ensure that “better-priced” orders on a protected marketplace are filled prior to the execution of the client order. Prior to executing the client order, the Participant must ensure that the client is aware of the better-priced orders and has consented to the Participant executing as against them in priority to the client order. The consent of the client must be noted on the order ticket.
If the client has given the Participant an order that is to be executed at various times during a trading day (e.g. an “over-the-day” order) or at various prices (e.g. at various prices in order to approximate a volume-weighted average price), the client is deemed to have consented to the entry of principal orders and non-client orders that may trade ahead of the balance of the client order. Unless the client has provided standing written instructions that all orders are to be executed at various times during the trading day or at various prices during the trading day, the client instructions should be treated as specific to a particular order and the details of the instructions by the client must be noted on the order ticket. However, if the un-entered portion of the client order would reasonably be expected to affect the market price of the security, the Participant may be precluded from entering principal orders or non-client orders as a result of the application of the frontrunning rule.
In certain circumstances, a client may provide a conditional consent for the Participant to trade alongside or ahead of the client order. For example, a client may consent to a principal order of Participant sharing fills with the client order provided the client order is fully executed by the end of the trading day. If the client's order is not fully executed, the client may expect that the Participant "give up" its fills to the extent necessary to complete the client order. In this situation, the Participant should mark its orders as "principal" throughout the day. Any part of the execution which is given up to the client should not be re-crossed on a marketplace but should simply be journalled to the client (since the condition of the consent has not been met, the fills in question could be viewed as properly belonging to the client rather than the principal order). To the extent that a Participant "gives up" part of a fill of a principal order to a client based on the conditional consent, the Participant shall report the particulars of the "give up" to the Market Regulator not later than the opening of trading on marketplaces on the next trading day. The conditional consent of the client must be specific to a particular order. The details of the agreement with the client must be noted on the order ticket.
Defined Terms:
NI 21-101 section 1.1 – “order”
NI 21-101 section 1.4 – Interpretation -- “security”
UMIR section 1.1 – “best ask price”, “best bid price”, “Basis Order”, “Call Market Order”, “client order”, “consolidated market display”, “employee”, “Exchange”, “limit order”, “Market Integrity Official”, “Market-on-Close Order”, “market order”, “Market Regulator”, “marketplace”, “Marketplace Rules”, “Marketplace Trading Obligations”, “non-client order”, “Opening Order”, “Participant”, “pre-arranged trade”, “principal order”, “QTRS”, “Special Terms Order”, “trading day” and “Volume-Weighted Average Price Order”
UMIR section 1.2(2) – “trade”
Related Provisions:
UMIR section 4.1 and Policy 7.1
Regulatory History:
Effective October 31, 2003, the applicable securities commissions approved an amendment to accommodate anonymous orders. See Market Integrity Notice 2003‑024 – “Accommodation of Anonymous Orders” (October 31, 2003).
Effective May 26, 2006, the applicable securities commissions approved amendments to repeal and replace Rule 5.3 and Policy 5.3. See Market Integrity Notice 2006‑012 – “Provisions Respecting Client Priority” (May 26, 2006).
Effective March 9, 2007, the applicable securities commissions approved an amendment to repeal and replace Rule 5.3 and to repeal and replace Parts 2 and 3 of Policy 5.3. See Market Integrity Notice 2007‑002 – “Provisions Respecting Competitive Marketplaces” (February 26, 2007).
Effective August 26, 2011, the applicable securities commissions approved an amendment to Rule 5.3(2) to replace the reference to “Market Maker Obligations” with “Marketplace Tracking Obligations”. See IIROC Notice 11‑0251 – “Provisions Respecting Market Maker, Odd Lot and Other Marketplace Trading Obligations” (August 26, 2011).
Effective December 9, 2013, the applicable securities commissions approved amendments to the French version of UMIR. See IIROC Notice 13‑0294 – “Amendments to the French version of UMIR” (December 9, 2013).
Effective September 18, 2015, the applicable securities commissions approved an amendment to Part of Policy 5.3. See IIROC Notice 15‑0211 - Notice of Approval – “Provisions Respecting Unprotected Transparent Marketplaces and the Order Protection Rule” (September 18, 2015).
Effective January 2, 2018, the applicable securities commissions approved an amendment to Part 3 of Policy 5.3. See IIROC Notice 17‑0137 – “Amendments Respecting Best Execution” (July 6, 2017).
Effective July 27, 2023, the applicable securities commissions approved housekeeping amendments to UMIR to correct inaccurate referencing and typographical mistakes and to ensure consistency between the English and French versions of UMIR. See CIRO Bulletin 23-0107 - "Housekeeping Amendments to UMIR" (July 27, 2023).
Effective December 22, 2025, the applicable securities commissions approved amendments to Rule 5.3 to accommodate the introduction of a “Contingent Derivative Order”. See CIRO Bulletin 25-0314 - "Amendments Respecting Contingent Derivative Orders" (November 20, 2025).
Effective January 13, 2026, the applicable securities commissions approved amendments to Rule 5.3 to accommodate the introduction of a “Net Asset Value Order”. See CIRO Bulletin 25-0200 - “Amendments Respecting Net Asset Value Orders and Intentional Crosses” (July 17, 2025).
Regulatory History:
Effective April 8, 2005, the applicable securities commissions approved an amendment to confirm that the best price obligation does not apply to Basis Orders. See Market Integrity Notice 2005‑010 – “Provisions Regarding a “Basis Order” (April 8, 2005).
Effective March 9, 2007, the applicable securities commissions approved an amendment to confirm that the best price obligation does not apply to Closing Price Orders, and to change the factors that may be considered in Part 1 of Policy 5.2 (“Qualification of Obligation”). See Market Integrity Notice 2007‑002 – “Provisions Respecting Competitive Marketplaces” (February 26, 2007).
Effective May 16, 2008, the applicable securities commissions approved amendments to Rule and Policy 5.2 to account for off-marketplace trades. See Market Integrity Notice 2008‑008 – “Provisions Respecting “Off‑Marketplace” Trades” (May 16, 2008).
Effective May 16, 2008 (retroactively), the applicable securities commissions approved amendments to Rule 5.2 to repeal the reference to transaction fees and to Policy 5.2 to revise Part 1 – Qualification of Obligation. See IIROC Notice 09‑0107 – “Provisions Respecting the “Best Price” Obligation” (April 17, 2009).
Effective February 1, 2011, the applicable securities commissions approved amendments to repeal Rule 5.2 and Policy 5.2. See IIROC Notice 11‑0036 – “Provisions Respecting the Implementation of the Order Protection Rule” (January 28, 2011).
Defined Terms:
NI 14-101 – section 1.1(3) – “foreign jurisdiction”
NI 21-101 – section 1.1 – “order”
NI 21-101 section 1.4 – Interpretation -- “security”
NI 23-101 – section 1.1 – “directed-action order”
UMIR section 1.1 – “better price”, “client order”, “consolidated market display”, “foreign organized regulated market”, “Market Regulator”, “marketplace” and “Participant”
UMIR section 1.2(2) – “trade”
Related Provisions:
UMIR sections 6.2 and 6.4; NI 23-101 – Part 6
Regulatory History:
Effective March 9, 2007, the applicable securities commissions approved an amendment to Policy 5.1 to add Part 2. See Market Integrity Notice 2007‑002 – “Provisions Respecting Competitive Marketplaces” (February 25, 2007).
Effective May 16, 2008, the applicable securities commissions approved an amendment to Part 2 of Policy 5.1 to replace the phrase “organized regulated markets outside of Canada” with “foreign organized regulated markets”. See Market Integrity Notice 2008‑008 – “Provisions Respecting “Off-Marketplace” Trades” (May 16, 2008).
Effective September 12, 2008, the applicable securities commissions approved an amendment to replace Rule 5. And Policy 5.11. See IIROC Notice 08‑0039 – “Provisions Respecting Best Execution” (July 18, 2008).
Effective February 1, 2011, the applicable securities commissions approved an amendment to repeal and replace Part 4 of Policy 5.1. See IIROC Notice 11‑0036 – “Provisions Respecting the Implementation of the Order Protection Rule” (January 28, 2011).
Effective December 9, 2013, the applicable securities commissions approved amendments to the French version of UMIR. See IIROC Notice 13‑0294 – Notice of Approval and Implementation – “Amendments to the French version of UMIR” (December 9, 2013).
Effective January 2, 2018, the applicable securities commissions approved amendments to repeal Rule 5.1 of UMIR. See IIROC Notice 17‑0137 – “Amendments Respecting Best Execution” (July 6, 2017).
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