Write short notes on the following : Post Trade Surveillance

It is one of the category of market surveillance which plays a vital role in ensuring market integrity, which is the core objective of regulators. It includes following: End of day alert - Alerts generated using statistical tools. The tool highlights stocks which have behaved abnormally form its past behaviour. Pattern recognition model - Models designed using high end tools and trading patterns which itself identifies suspects involving in unfair trading practice. Transaction alerts for member - As part of surveillance obligation of members the alerts are downloaded to members under 14 different heads.