RE: Qwik Qwiz10 Jan 2019 12:16
zeus - I used to think that there should be a sell needed to produce a tick down in Bid. I don't any more.
Jaga - The rate is determined from the experimentally measured imbalance between Buys and Sells. The shares to have to come from somewhere, at some point, they cannot be magic'ed out of thin air and do not grow on trees, so for all the excess of Buys from Market Makers there will have to be an excess of a similar amount of Sells to them at some point in time.
They would not have risked selling shares that they do not have (i.e. going short) unless they had a large seller lined up or already being tapped. Joe Public will only be allowed to see what has happened when it has already happened.