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What: Shares of ExactTarget (NYSE:ET) missed the mark today, down by as much as 16% after the company reported earnings with weak guidance.

So what: Revenue in the quarter was $88.9 million, with an adjusted net loss of $0.08 per share. Those results topped consensus estimates, which were asking for $88 million in revenue and a loss of $0.09 per share. Earnings guidance for the coming quarter left something to be desired, though.

Now what: The second quarter is expected to generate an adjusted loss of $0.10 to $0.12 per share, which is worse than the $0.08 per share adjusted loss that investors were bracing for. Revenue should be in the range of $91 million to $92 million, which means ExactTarget will need to land near the high end to meet the $91.9 million that the Street is modeling for.

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Fool contributor Evan Niu, CFA, has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. 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.