Day traders have put this stock into play in order to channel trade it. They will BUY/FLIP stock between the range of 1.10 to 1.30 and when buyers stop buying, they will let the stock go down to 1.00 range and begin again, all the way down to .90 cents again.
It's like a cake playing with a mouse because they know more eyes are on PULM so they will channel it for daily profits by controlling the BUY/SELL side for weeks.
Just a hunch to explain the sudden SPIKE at the end of the day and now all this selling and flipping...
If there were news pending, the stock never would have dipped and then stayed low. It would have dipped, the ripped higher...
Channeling seems to be the reason now...
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