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 Sunrise Senior Living (NYSE: SRZ) fell more than 10% one day after a 9.8% drop. Investors can't seem to forgive the caregiver for its lousy second-quarter earnings report.

So what: Sunrise reported earnings on Wednesday night. Revenue came in light at $322 million while the company's $0.02-per-share profit benefited from a one-time $11.3 million gain on an equity investment. Sunrise would have suffered a net loss without it.

Now what: As it was, analysts were expecting the company to lose $0.04, but on $324.6 million in revenue. Unsurprisingly, Sunrise -- a two-star stock in our Motley Fool CAPS database that's seen revenue decline in five of the past six quarters -- couldn't meet the threshold. I can't blame the sellers for getting out while there are still buyers out there. Do you agree? Disagree? Weigh in using the comments box below.

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Fool contributorTim Beyers is a member of theMotley Fool Rule Breakers stock-picking team. He didn’t own shares in any of the companies mentioned in this article at the time of publication. Check out Tim'sportfolio holdings andFoolish writings, or connect with him on Google+ or Twitter, where he goes by @milehighfool. You can also get his insightsdelivered directly to your RSS reader.

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