You literally produced 0 arguments. Market maker is pretty irrelevant to the situation influential institution who's goals are aligned with other major players having pull on DTCC actions would be more relevant. I again have not dug in too much as was not relevant to me but looked fairly suspicious. I have direct knowledge of relevant situation where investment bank arm or top 5 US bank had Knight Capital Group type moment. They had enough pull to make all transactions not clear and get unwound so exerting that type of influence would not surprise me.