Identifies an event related to a SecurityTradingStatus <326>. An event occurs and is gone, it is not a state that applies for a period of time.
2 = Trading resumes (after Halt)
4 = Change of Trading Session
5 = Change of Trading Subsession
6 = Change of Security Trading Status
7 = Change of Book Type
8 = Change of Market Depth
or any value conforming to the data type Reserved100Plus