BS, this is not some simple retail sale of something. MM controls whatever they like in fact. Any Broker will tell you they can do just about anything they choose. There is no seller that sells for less then they can get, thats illogical. When NITE is the bid and the ask its not good for anyone but NITE. Who is this seller that takes 15% less then current sales? There is no such seller. That the MM. People act predictably and people buy predictably, people do not sell something for less then the current available price, they sell for the going price. Would you sell your home for 15% less then the going price? I think not.
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