Whoever it is seems to have skipped from one local brokerage to the next honing his system and turning the latest, Yatirim Finansman, into the biggest net buyer

Whoever it is seems to have skipped from one local brokerage to the next honing his system and turning the latest, Yatirim Finansman, into the biggest net buyer on the market by far. YF is elsewhere explained to have represented ~2% of the market prior to this actor deciding to use it as his brokerage. It is very difficult for me to credit a market maker with that sort of impact on net buys, unless the market maker is very, very, very bad at their job.