actually, it's the brokers. most trades on the grey market are done in house. if a broker has a match he can make he notifies their mm and the mm facilitates the trade. there is no incentive for a broker to call other brokers looking for a match other than generating a small trading fee. there is even less incentive for an mm to call around as they make no money. they facilitate trades as a favor to their broker clients.
the reason this hasn't traded is because there is either no interest or because there has not been a meeting of the minds between buyers and sellers.
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