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.

Source: Wikimedia Commons

What: Shares of online marketplace Angie's List (ANGI) soared by as much as 56% on Wednesday after the company reported stellar fourth-quarter results and issued full-year guidance that significantly exceeded Wall Street's expectations.

So what: It's always nice to achieve a first. "For the first year in company history, [we] generated positive adjusted EBITDA," announced Angie's List CEO Bill Oesterle in the press release announcing fourth-quarter and full-year 2014 results for the online marketplace EBITDA, or earnings before interest, taxes, depreciation and amortization, is a measure of cash flow.

The key to the company's fourth-quarter "beat" on earnings per share was a 53% drop in marketing expense (that line was roughly flat for the full year relative to 2013). Lower marketing expense is very probably instrumental in explaining company guidance on EBITDA for this year that is well ahead of what analysts were forecasting – indeed, guidance on revenues was in line with the consensus estimate:

 

Achieved

Analysts' Consensus Estimate

Q4 Revenue

$82.2 million

$81.2 million

Q4 EPS

$0.26

$0.22

 

Guidance

 

2015 Revenue

$357 million-$363 million

$360 million

2015 Adjusted EBITDA

$28 million-$30 million

$23.6 million

Source: Thomson Financial Network, Angie's List

Now what: Today's share price "pop" helps to recoup some of the losses Angie's List's long-term shareholders have sustained. Prior to today, the stock was down more than two-thirds from its closing price on its first day of trading in November 2011 ($16.26). Uncertainty remains, but Angie's List could be on the verge of sustained profitability. If that's the case, the bottom may well be in with regard to the stock price. Fundamental investors will need to keep a close eye on results over the next several quarters for confirmation of this quarter's performance.