For Vietnam stocks, we are receiving incorrect/garbage trade quantities during Opening and Post-trading sessions.
For ric=DIG.HM , date=20220510 and RFA version=8.2.0
We have received a constant tradeSize=50400 (FID 178) for all trade messages before 09:15am during opening session. During normal market hours, the tradeSize starts changing and looks reasonable.
Is there a special meaning to tradeSize during Opening and Post-Trading sessions for Vietnam?