If you don't want to sell in the short term and you believe...

If you don't want to sell in the short term and you believe $4.30 is cheap then if I was you I'd just ignore the markets craziness and even consider buying more if I had funds I wanted to allocate to my investment in the company. I bought my first lot for 40c several years back and watched while it went to <20c. Once I was happy the company was again going to deliver on it's underlying value I bought many times more. Not quite the same situation, back then there was a reason why it fell to 20c, but similar approach. However, make your own decision.