I am not sure it would spike lower without significant cash burn being that the company has expressed a clear interest in BO.. but anything is possible through manipulation as was very well-illustrated when the stock gapped down from .80+ to below .60 with ask slapping for millions of shares (all pre-market!)
Nothing I have ever seen reeks of manipulation more than that.
I'll just remind you that sales was UP in 2017. 5000 units vs 3000 units 2016. I'll also remind you that they haven't even begun marketing their Premier spinal products.
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