A buyback is something that technically could go on... but it doesn't make any logical sense and there currently isn't any motive to do so that holds any water.
From Investopedia - Share Repurchase:
A program by which a company buys back its own shares from the marketplace, reducing the number of outstanding shares. This is usually an indication that the company's management thinks the shares are undervalued.
Unfortunately, you seem to be right based on recent average volume. Neither Hemi's management, nor anyone else sees any reason to invest in this company lately.
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