this isn't a "massive deal" this is a company who is not on the nasdaq buying a bankrupt company that is listed to get on the nasdaq at a bargain price.
They sold off there IP ( probably to a patent troll ), they have sold all there assets and now the last thing they have of any value is there listing.
It doesnt matter how much the stock continues to crater ( and crater it will) because they will continue to issue enough new shares and r/s to keep the listing.
All Sigma investors will have lost all there money
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