I have been dealing with these stocks since 1984 or thereabouts and have learned many ways and means they sell and distribute equity. Shorting is not readily visible in a manner being meaningful as real distribution is. Yesterday, nearly half of total volume was probable new share sales.
Usually, when shorting occurs, it appears as an accounting exercise - obvious mathematical episodes repeated with notable suffix signatures.
New share distribution and large scale systematic selling are opportunistic events like boxing - jabbing, bobbing and weaving in and out of normal market activity or like a kid cutting in out of nowhere to get his share then running away to enjoy his prize. And often there is only one marketmaker doing the deed. These are the traits of the IGPG mystery volume. Add the execution price relative to the spread and you have them pegged.
Once they get heat from who knows where about being conspicuous, they will try to disguise their efforts - selling at bid, not backing out at ask, etc.
IGPG has had a few promising technical events come and go without reward. Technical interest makes things easier for them - more unsuspecting customers/bait. Unfortunately, we are listening to the music without much to say. If volume were much greater three things could happen - share price could go down; share price could go up, they could distribute even more shares in shorter time.
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