Why Are Corporate Insiders Selling Their Shares?

Any time corporate executives and directors are heavily selling their company's stock there's reason for concern. And lately they've been doing just that.

The last time insider selling was as high as it is now was in the period from late 2006 to late 2007. It was right after that insider-selling surge that the stock market began its long painful decline, says Charles Biderman, CEO of TrimTabs, an independent institutional research firm.

Biderman believes that insider trades shoot higher when there's a disconnect between broad market opinions and what business executives feel in their gut. "When [insiders think] things are going better than most people think, they buy stock," he says. "When things are going worse than people think, they sell." (more)