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: 51job (Nasdaq: JOBS) dropped 15% in intraday trading today after a negative mention in an investment report.

So what: Zacks published a report on on the human resource and employment services industry. 51job was criticized for its P/E ratio of 43 times, along with On Assignment (Nasdaq: ASGN) for its P/E of 69 times, Heidrick & Struggles International (Nasdaq: HSII) for its P/E of 65 times, Robert Half International (NYSE: RHI) for its P/E of 46 times, and TrueBlue (NYSE: TBI) for its P/E of 28 times.

Now what: Disappointing jobs reports and economic news are clouding the outlook for the industry in the United States. 51job focuses on the much stronger Chinese market, however. While a weaker U.S. economy could slow jobs growth in China, investors should think twice before laying off 51job's stock.  

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Fool contributor Cindy Johnson does not own shares of any company named above. Motley Fool newsletter services have recommended buying shares of 51job. 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.