Yeah, they tried to carry the suffix symbology into the ticker itself, but that fortunately died not because of some great sanctity of the symbols but because s

Yeah, they tried to carry the suffix symbology into the ticker itself, but that fortunately died not because of some great sanctity of the symbols but because someone thought it would confuse too much with how ACT and the CTCI protocol handled security categorization. NYSE (really the access stack that both NYSE and AMEX ran on; the name escapes me since it died back in I think ‘08) has for a long time included a completely separate field in their protocols to indicate classification (preferred, warrants, classes, when issued, etc), but CTCI just jammed it into the symbol field.