Salutations Pierre,

 

Voici ce que j'ai trouvé concernant ces transactions mystérieuses...

Broker Codes:   100 - TSX - TSX Buy-ins (CDS)

 

TSX Buy-Ins

In order to support CDS in cases where a seller has failed to deliver a security following a trade, TSX has developed a special "Buy-In" facility to locate alternate sellers capable of immediately delivering the security, therefore enabling CDS to quickly and efficiently clear the failed position.

Buy-In Procedures:

On a daily basis, CDS provides a list of securities that Participating Organizations have failed to make delivery on.

1:30 PM (1st Cycle) - TSX receives and posts the preliminary Buy-In list. At this point, other Participating Organizations have the opportunity to provide liquidity by submitting Buy-In orders.

2:45 PM (2nd Cycle) - TSX receives and posts the Final Buy-In list. This list identifies the remaining securities that still need to be delivered.

3:00 PM - Cut-off for accepting Buy-In orders

Upon completion of the Buy-In period, TSX allocates fills on an equal by member basis to the sellers and calculates a price. This price is based on the last board lot trade before 3:00 plus a premium.

Buy-In Price = Last Board lot Sale Price + Premium

TSX manually enters these trades that are cleared by CDS on a same-day basis. Between 3:20 and 3:40, TSX Trading Services will provide transaction confirmations. This process efficiently clears failed delivery trades and helps to maintain overall market integrity.

 

http://www.tmxmoney.com/en/market_activity/buy_ins.html

 

Jean-Paul