I don't know if they are instituted by a company (GWMG) or the exchange. I suspect that initially they would be indtituted voluntarily by the company or by the exchange after they want more information after a release. My previous experience with company halts has been that they are done during the day rather than before opening. Any thoughts. I suspect if not initially halted the SP will jump somewhat. I will be watching my limit offer with a view to increasing the limit after open.