"Sales can take place outside the bid and ask.An internal sale between client A of house 7 to client B of house 7 can be done outside the market.Not unusual."

This concept reminds me of something that happened to a friend of mine a few years back. He and I were big into oil and gas trusts and his bank called him up out of the blue and attempted to get him to sell some trusts he had not been monitoring nor wanting to sell. He could not believe the pressure he was put under. Obviously he was not into a margin account and the bank could not borrow them so they pressured hiim but he did not give in.