BOX Options: Automated Trade Reporting (“ATR”) Protocol Version A2

The purpose of this circular is to introduce ATR Protocol Version A2 which contains the following features compared to the previous ATR Versions A0 and A1:

1. Decommission “As-Of” type business messages with alternative replacement 
2. Enhanced Login with password encryption 
3. Expanded Message Sequence Number 
4. New fields in business messages to ensure message uniqueness 
5. New Error management 
6. New Participant messages for post-trade operations

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