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 construction supplier Quanex Building Products (NYSE: NX) fell 10% today after the company released disappointing earnings.

So what: Fiscal-second-quarter revenue was $203.1 million, above analyst expectations of $196 million, but earnings left a lot to be desired. The company posted a loss per share of $0.04 versus an expected profit of $0.11.

Now what: It isn't surprising that the building market isn't strong right now, but it's apparently weaker than investors expected. A high inventory of homes for sale, relatively tight credit, and a lack of tax incentives are being blamed. I am staying away from anything housing-related because I think the recovery will take much longer than anyone expects, as we saw today.

Interested in more info on Quanex Building Products? Add it to your watchlist.

Fool contributor Travis Hoium does not have a position in any company mentioned. You can follow Travis on Twitter at @FlushDrawFool, check out his personal stock holdings or follow his CAPS picks at TMFFlushDraw.

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