There was no trade below .0001. The only thing i wonder if some off-exchange dumping somehow, by someone trying to zero-out wash sale restrictions. Wash sales are disallowed losses on tax returns, until the very last share in your account is sold, according to my understanding.
If someone made big profits on other stocks (as many did this year) they could for example be motivated to dump this at zero in order to offset profits in other areas -- to avoid being in a higher tax bracket, for example. That kind of situation.
But there were 4 or 5 trades at .0001 -- nothing visible below that, as far as I could see.
Welcome anyone else's fact-based theories....
