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 Halozyme Therapeutics (NASDAQ:HALO), a biopharmaceutical company that develops human enzymes that alter human tissues and make for more effective drug delivery, jumped as much as 25% after reporting its first-quarter results and providing an update on experimental pancreatic cancer drug PEGPH20 in study 202.

So what: The big share-price-driving news was the announcement from CEO Helen Torley that following its temporary halt of PEGPH20 in early April due to thromboembolic event concerns, the company supplied the data monitoring committee with additional requested information, and has been informed that "they [DMC] now support continued enrollment of patients and dosing of PEGPH20 in the trial with the proposed study modifications."

For the quarter, Halozyme produced $12 million in revenue, up slightly from the $11.8 million reported in the prior year, while its loss widened to $26.5 million, or $0.22 per share, from $19.3 million, or $0.17 per share in Q1 2013. As Halozyme noted, larger investments in its clinical pipeline results in its wider loss. By comparison, Wall Street was expecting a narrower loss of just $0.14 per share.

Now what: As with most predominantly clinical-stage companies, investors are more than willing to overlook a wider loss if it's to advance or expand a clinical pipeline. As for PEGPH20, its clinical hold should, in my opinion, never have resulted in the cataclysmic tumble that Halozyme shareholders endured. It's simply enrolling in a phase 2a study, and should hardly be a blip in terms of overall valuation for Halozyme, so it's good to see at least part of the company's value returning from its drop last month. With MabThera SC, which utilizes Halozyme's subcutaneous delivery technology, now approved in Europe, and Hylenex meeting the mark in the CONSISTENT-1 trial, I'd suggest that there could be some decent upside to Halozyme's shares here, and would encourage more risk-willing and biotech-savvy investors to take a deeper dive.

Halozyme shares may have soared today, but even it could struggle to keep pace with this top stock over the long run
Give me five minutes, and I'll show how you could own the best stock for 2014. Every year, The Motley Fool's chief investment officer handpicks one stock with outstanding potential. But it's not just any run-of-the-mill company; it’s a stock perfectly positioned to cash in on one of the upcoming year's most lucrative trends. Last year, his pick skyrocketed 134%. And previous top picks have gained upwards of 908%, 1,252%, and 1,303% during the subsequent years! Believe me, you don't want to miss what could be his biggest winner yet! Just click here to download your free copy of "The Motley Fool's Top Stock for 2014" today.

Sean Williams has no material interest in any companies mentioned in this article. You can follow him on CAPS under the screen name TMFUltraLong, track every pick he makes under the screen name TrackUltraLong, and check him out on Twitter, where he goes by the handle @TMFUltraLong.

Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.