Wash sale is manipulation of the market because it creates a wrong picture of the market health.
Basically you create an illusion of a healthy market with lots of volume (to dump on noobs and afterwards say goodbye forever).
of course, but which exchange will let it's matching engine be used add infinity for free? as such the wash trader will incur costs... And it gives an idea of what size they dispose...
what stop them to have two legal entity and still "wash" legally?
furthermore I find this discussion particuliarly funny in the context of fiat printed to the friends of the fed...
anyway, thanks for repeating their mantras.
Its quite common and exchanges do that themself, because they profit from it too.
There is basically no way to stop it - you can just make the cost higher for the manipulators.
this is exactly what I am saying... or it's the exchange doing it on itself like you says, or it will cost the washer...
anyway good luck washing on
https://bisq.network/ (a true real decentralized p2p exchange using escrow)... it's so expensive

!
but I think it is almost impossible to wash trade on a modern exchange... when you have quantic predictive algos ready to take trade in sub nano seconds... it's hard to be certain that the wash trade will be cleared with one self... ehehe... who knows what "artficial" lag the matching engine can introduce... because they all say that they self regulate and their code is private...
trading on a non open sourced engine is positive proof of advance gulliblity...
I dont believe DEX will help against wash trading.