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 Tekelec (Nasdaq: TKLC) fell 16% today after the company released disappointing earnings.

So what: The fourth-quarter loss was double the $0.01-per-share loss analysts were expecting.

Now what: Declining orders intake and slow acceptance from a customer in India hurt results, and the company's outlook didn't make anyone feel better. Analysts expected 2011 earnings of $0.77 per share; the company is expecting a much lower $0.20 to $0.30 per share in earnings. None of this is good news and I am definitely a seller of Tekelec today.

Interested in more info on Tekelec? 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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