inverted, SBSH had sold shares that they don't own (shorted) at a higher pps hoping that they'll be able to buy them back later (cover) at a lower amount (the SEC regulates how long they have to cover). It works for them as long as the price goes down. If no one sells and it goes up, they get screwed. That's why whenever we have a big, quick run-up, there's always a short cooling period (shake/retrace) where the MM's artificially lower the pps to enctice people to panic sell.