As someone who thoroughly believes there is no major naked short interest in IPIX...what happened today was undoubtedly criminal.
To go that far below the market trend to grab a massive 800,000 shares blatantly in broad daylight was unbelievable. That market maker must have been seriously short and knew risk of doing that trade was far less than holding the short much longer.
They wouldn't do it to accumulate shares because the gains would just be disgorged. But to cover a short position, they'll get the slap on the wrist if it ever was investigated but won't hold a 800K short position to $3+