Is “Stop Loss Order” valid in Pre-opening session (9:30 a.m. to 10:00 a.m.)?
No. The Stop Loss Order is not applicable to pre-opening session. But Final Indicative Equilibrium Price (IEP) will be treated as the Nominal Price when market open, therefore the Final IEP (if any), will be used to check against the Stop Loss Price. In case, the Final IEP falls at or below your Stop Loss Price, the Stop Loss Order will be placed to market after the morning trading session starts.