Each earnings season brings its fair share of epic surprises to the upside and downside. Sometimes a big sell-off is justified or a sign that the worst is only beginning. But a stock can also sell off for reasons that don't break the investment thesis -- opening the door to a buying opportunity.

Here's why Walmart (NYSE: WMT), Trimble (NASDAQ: TRMB), and Kinder Morgan (NYSE: KMI) all fell on earnings but could be worth buying now.

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Source Fool.com