Shares of Zillow (NASDAQ:ZG) have had an impressive run recently and delivered stellar growth for investors last year, but now, two key insiders among the company's top brass, including CEO Spencer Rascoff, are selling off shares. Should investors be worried?

In this segment from Thursday's Where the Money Is, Motley Fool banking analyst David Hanson takes a question from the mailbag, investigating the insider selling at Zillow. As the old Wall Street adage says, while there is only one reason to buy, there are many possible reasons to sell a stock. David looks at why these two insiders might be selling, and tells investors he's not concerned.

David Hanson owns shares of Zillow. The Motley Fool recommends Zillow. The Motley Fool owns shares of Zillow. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.