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 biopharmaceuticals small fry Novavax (Nasdaq: NVAX) jumped more than 10% in intraday trading on heavy volume.

So What: So what? is just about right. Oftentimes, big stock movements can be explained by company news, events, or even something positive or negative happening with a competitor. Sometimes, though -- as appears to be the case here -- momentum can just build up and push the stock in one direction or another without any clear driver.

Now What: Like fellow biopharma players BioCryst Pharmaceuticals (Nasdaq: BCRX) and Sinovac Biotech (NYSE: SVA), Novavax will live or die on its ability to develop effective products that are approved for the commercial market. Quick pops in the stock like this may put a flutter in bulls' hearts, but the only reason the move itself might be notable is if a current investor sees it as a good time to make an exit. Otherwise, there's little reason to pay it much mind.

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Fool contributor Matt Koppenheffer does not own shares of any of the companies mentioned. You can check out what Matt is keeping an eye on by visiting his Motley Fool CAPS portfolio, or you can follow Matt on Twitter @KoppTheFool or on his RSS feed. The Fool's disclosure policyassures you no Wookiees were harmed in the making of this article.