Definition
NI 23-101 (Trading Rules) imposes obligations on both marketplaces and their participants. The best-execution obligation in Part 4 requires dealers to make reasonable efforts to achieve the most advantageous execution for clients, considering price, speed, certainty, and total cost across all marketplaces. Order protection rules prohibit trade-throughs: a trade on one marketplace cannot execute at a price worse than a protected order resting on another marketplace. The order-protection rule does not apply to odd lots, OTC trades, or intentional cross transactions that meet defined conditions. NI 23-101 also sets out rules for order exposure and the prohibition on front-running client orders. Together with NI 21-101 (Marketplace Operation) and UMIR (which CIRO enforces), NI 23-101 forms the three-part regulatory framework for fair and orderly trading on Canadian markets.
Source
National Instrument 23-101 Trading Rules; Companion Policy 23-101CP
Where this shows up on the CIRE
- Outcome 8.1