avo sp up and down

Seems something odd here. Avoca announces significant resource increase just ahead of future outlook post with a negative in it. Seems something spooked investors, perhaps the high cost per ounce, just under $800. The sp goes to $2.99 and two days later at $2.68. 11 % up, 10 % swing down. Great steal if you knew what was coming. But galling if you didn't. Any one else got a comment here?