Part of trading cycle when an instrument expires. Field is applicable for derivatives.
0
=
Expire on trading session close (default)
Added FIX.4.4
[ExpireOnTradingSessionClose]
1
=
Expire on trading session open
Added FIX.4.4
[ExpireOnTradingSessionOpen]
2
=
Trading eligibility expiration specified in the date and time fields [EventDate(866) and EventTime(1145)] associated with EventType(865)=7(Last Eligible Trade Date)