Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of biotech Neurocrine Biosciences (Nasdaq: NBIX) were up more than 10% in intraday trading on higher-than-average volume.

So what: Earlier this week, Neurocrine announced it had successfully completed a second phase 1 test of its vesicular monoamine transporter 2 (or VMAT2 for short) compound. That means the company will be able to move the drug into phase 2 studies later this year. However, we're now a couple of days removed from that, so it seems more likely that today's move is typical biotech volatility rather than a reaction to that news.

Now what: In typical biotech fashion, Neurocrine is consistently unprofitable and spends most of its time burning cash in search of a big drug approval. While today's jump may put a flutter in bulls' hearts, the big picture remains the same -- either get a significant drug approved and watch the stock go to the moon or whiff on the approval front and see the stock's price drop like Disney's Tower of Terror.

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