It's not the first time I have seen a company's share price go...

It's not the first time I have seen a company's share price go down on very good news/announcement.
Traders found this as a perfect opportunity to get out and move to their next stock, they would have hoped for a higher share price, but sold out throughout the day.

I have a 2 year time frame on these so the short term activity now does not matter, but I am very confident this will end the year very strongly as more analysts/brokers cover the company.
It is considerably underpriced based on its competitors in the same sector.