The sale of stock by company insiders can be of great significant or have little meaning at all. A recent release of the newsletter Crosscurrents noted that insider sales of Microsoft (MSFT 0.58%), Oracle (ORCL 1.78%), and Qualcomm (QCOM 1.15%) have been unusually high lately. While the absolute numbers are small, the ratio is fairly drastic.

In the video below, Fool.com contributor Doug Ehrman discusses if this should be a warning sign for these companies, the technology sector, or the market as a whole. He then looks at some of the regulations that impact insider selling and helps to put these figures in context.