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 Builders FirstSource (NASDAQ:BLDR) jumped 11% today after the company released earnings.

So what: Sales were up 38.1% from a year ago to $402.9 million, the eighth straight quarter year-over-year growth has been over 30%. Net income swung from a loss of $13.6 million a year ago to a $12.6 million profit, or $0.13 per share.  

Now what: The company's operations are improving across the board, with gross margins up and SG&A costs down as well. If the housing market continues to improve I think the company's results will follow, although it's just barely swinging to a profit. The stock is trading at 20 times forward estimates, but management has crushed those estimates the last two quarters, which is why I think the stock still has plenty of room to run.

Fool contributor Travis Hoium has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. 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.