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This stock is up 300%. So why are insiders selling?

If you bought shares in Orbitz at the start of this year, you would be a very, very happy camper. The online travel company's stock has more than quadrupled in the last eight and a half months.

That's not saying Orbitz is a safe bet. It's actually very volatile.

Less than two years after going public in 2007, the company's shares were down more than 90%. It then was up nearly five times that low nine month after. Then it was down 70% a year after that. And now it's up again.

In other words, spectacular runs and big drops are almost expected.

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One investor getting out of some of their shares while the going's good again is PAR Capital Management. PAR is Orbitz's second-largest shareholder. They sold 8.1 million shares out of the 24.6 million they acquired in between 2007 and 2009. That took them from 23% ownership to 16%.

The news of PAR's sale sent Orbitz's share prices down 12%.

So, if one of the biggest shareholders is selling, should you sell too?

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We ask that of Talking Numbers contributors Enis Taner, Global Macro Editor at RiskReversal.com, and Richard Ross, Global Technical Strategist at Auerbach Grayson. They look at Orbtiz's fundamentals and technicals respectively to determine if this is a good exit point.

Watch Taner and Ross analyze Orbitz in the video above.

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