Can you also look into the fact that IG were ringing around clients the day before the suspension and offering the opportunity to open new LONG positions.
I had been trying to open positions before and they said they were up to their maximum. That maximum being 2%. They will only go tot 2% because if they go to 3% and over then they would have to declare as they cover their positions with buys in the market thru a CFD co (is it GME owned by MAN FINNACIAL)
How ever another question arises here. IF they had 2% of stock at the point and then had a few sellers to release headroom why was there no 8.3 forms filled out as anyone over 1% had to declate post RAF takeover talks starting.
OR were they taking on more than 2% longs coz they already new about suspension and related problems.
I think you should first of all try to find what IGs net position is on this stock how much was hedged thru CFDs.
Plus i think it very improper them calling clients to offer them positions!!