Many prop firms rely only on C for their traders to make volume, anyone have ideas on what they will do after the split and volume is gone?
The volume will move into another stock. The traders won't go away they will just adapt to a new stock. Either ALU or S imo.
undercapitalized firms are gonna go red on their clearing, but its not like a mass exodus the day c splits. youll probably see the aftermath within 6-8 months later once firms decide not to renew their clearing arrangements.