Kyle, Benjamin Graham said this about stock prices many year's ago and it hasn't ever changed that I know of.

A stock is only worth what it is trading for at that moment in time, but all of them have the potential to go higher or lower from that point going forward.

With that said, if Jazz was worth $15/shr as you say, it would be trading at $15/shr. It's not.

You left a lot of money on the table.

Dennis Gartman put's it this way, if you allow a stock to pullback over 25% your a poor money manager.