Orion123, I think item 1 should be the valid reason. As for item...

Orion123, I think item 1 should be the valid reason. As for item 2, the probability could be very low. The sellers in the past few trading days were most likely day traders or shorters in need of cash I guess. Also, the Chinese are actually not interested in manipulating such a tiny-cap biotech stock coz they can't easily make big decent and quick money from sp manipulation as compared to that in China where "a small group" may manage billion dollar fund and have secret access to insider information, and they don't dare to do this as the stock is publicly listed and effectively regulated in Australia not in China - so pab is possibly not on their radar at all. In fact the wealthy Chinese mostly prefer investing in low-risk yet high-return property in Australia.