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 business intelligence specialist MicroStrategy (Nasdaq: MSTR) are wearing a dunce cap today, with shares plunging 19% after the company reported earnings this morning.

So what: Revenue in the third quarter came in at $141.7 million, and earnings per share totaled $0.44 for the period. Sales put up a healthy 24% increase, but heavy increases in operating expenses held back the bottom line, which fell 30%.

Now what: Third-quarter net income included a $3.4 million pre-tax gain generated from the sale of an equity investment, which represents a big chunk of the $4.9 million profit reported. Without it, the bottom line would have plunged even more, and investors are expressing their disappointment by dropping the stock. The company, which competes with Motley Fool Rule Breakers recommendation Qlik Technologies (Nasdaq: QLIK), also saw its shares downgraded by UBS from buy to neutral.

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