Maybe someone, or several someones, is selling and I couldn't say why at this point, but I will point out that over the last few months I have bought well over 50,000 shares at the bid, or between the bid and ask.
I'll put the buy in before I shower in the morning, thinking it might drop during the day and often by the time I'm ready to leave for work the buy goes through at the bid. I have no idea why this happens but it does.
GLTA
imin