Agreed, but it's not just STXG. When they back off for a few minutes, both PUMA and JANE (who doesn't sell a single share and only lowers the ask to help stack it) jump up to take their place and continue dropping it. All the while PUMA sits on the bid as well to wash+rinse+repeat...
And there's PUMA absorbing on the bid, and watch them turn around and throw them right back on the ask. Sometimes at the exact pps they just got on bid, which doesn't make a lick of sense, unless they're either shorting/covering, or just trying to push/hold it down.
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