They are not short any fake shares. thats a phantom , a myth utter. verbal diarrhoea....
the market is electronic , end of ....
Ken Griffin would not know the name of the perpetrators boss's boss's boss , they have 2500. employees .
Compliance will look, if there are cancelled trades without a reason, whoever did the trades is in big trouble as would be their boss and maybe even one rung higher .
If it was client driven they'd still be screwed but so would the client .