RE: 100k+ buyer15 Mar 2023 21:54
And if that seller is the Market Maker then the stock is coming out of their pool and reducing it. That is how supply and demand always dictated the share price, for those that knew how the market worked before SETS. MM's still keep a float of stock in order to maintain an orderly market for the stock (a requirement by the LSE of being an MM!), and MM's buy and sell through SETS too, and set the advertised prices.
A 100k buyer has been soaking up the sells at this price. If you look at their trades you can see that 90k to 100k shares were sold and then they bought 100k to hoover them up.