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 software maker Progress Software (Nasdaq: PRGS) are plunging today, down by 14% at the low, after the company reported fourth-quarter earnings last night.

So what: Revenue added up to $136.3 million and non-GAAP earnings per share ended up at $0.34. Both figures came in better than consensus estimates, which called for $133.4 million in sales and $0.33 per share profit.

Now what: Progress CEO Jay Bhatt said the results reflect challenges that the company is facing in its ongoing transformation. Next quarter's guidance is what's rattling shareholders. First-quarter sales are expected to fall 10% year over year to roughly $120 million, while diluted earnings per share are supposed to drop 40% to $0.25. The outlook is short of the $132 million revenue and $0.38 EPS that the market is looking for.

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