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 Monolithic Power Systems (Nasdaq: MPWR) jumped as much as 15% early in trading after the company released earnings.

So what: During the fourth quarter, revenue declined 10.4% from last year to $47.5 million. Non-GAAP net income was $5.2 million, or $0.15 per share, topping the $0.11 in earnings analysts had expected. GAAP net income was $2.5 million, or $0.07 per share.

Now what: The company is hoping to return to growth in 2012 after a transition plan was executed in 2011. If the company can return to growth, shares may be worth looking at again. For now, I can't pay a forward earnings multiple of 17 for a company whose revenue is declining even after beating analysts' expectations today.

Interested in more info on Monolithic Power Systems? Add it to your watchlist by clicking here.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.