Last month, four insider executives within ExOne (NASDAQ:XONE) sold off a total of roughly 1.5 million shares of the company's stock, to the tune of $88.4 million. Should investors be worried that something is fundamentally wrong behind the scenes? In this video, Motley Fool industrials analyst Blake Bos discusses why this move was to be expected, and why it could be another sign that the stock is a bit overvalued.

Blake Bos has no position in any stocks mentioned. The Motley Fool recommends ExOne. The Motley Fool owns shares of ExOne. 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.