March 30, 2023
Equities Notice 2023-011

TMX Group

TMX Equity Trading Notice

Reminder: Implementation Details for Q2 2023 Trading Enhancements

TMX Market Operations would like to remind all clients of the upcoming Q2 - 2023 Enhancements to the Toronto Stock Exchange ("TSX"), TSX Venture Exchange ("TSXV") and TSX Alpha Exchange ("TSXA"). These enhancements are currently available for testing in the GTE environment and are scheduled to be available in our production environment effective May 1st, 2023.

Implementation details can be found as follows:

Enhancement

Markets

Reference

TSX ETF Indicative Midpoint

TSX, TSXV

Datalinx Notice 2023-001

Timestamp GranularIty

TSX, TSXV, TSXA

Datalinx Notice 2023-001

Enhanced Cancel Reason Codes

TSX. TSXV, TSXA

Equities Notice 2023-001

We are also advising clients that an additional reason code from what was originally announced will be made available as follows:

Specification

Tag

Field Name

Comments

FIX Order Entry

58

Text

‘Killed due to Post Only'

Broadcast Feed

616

ReasonCode*

‘42' - Killed due to Post Only

*The tag is private and thus fully encrypted

Updated specifications and technical details for these enhancements can be found on the TMX Webstore.