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 Satcon Technology (Nasdaq: SATC) plummeted more than 20% Wednesday after the clean energy technologist's quarterly results and near-term sales outlook disappointed investors.

So what: Despite a 238% jump in revenue and improved gross margins, Satcon posted a fourth-quarter loss of $0.03 per share, while Wall Street was expecting a profit of $0.03 per share. More importantly, management's first-quarter revenue forecast of $65 million -$70 million also came in well below the average analyst estimate of $75 million.

Now what: I wouldn't be so quick to pounce on this plunge. The stock has been on fire over the past year, but management's disappointing guidance has Mr. Market questioning if there's a little too much optimism built into the price. Satcon's solar growth prospects certainly remain sunny, but I'd wait for an even cheaper price to buy into them.

Interested in more info on Satcon? Add it to your watchlist.

Fool contributor Brian Pacampara owns no position in any of the companies mentioned. Try any of our Foolish newsletter services free for 30 days.

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