Yet another post from you with personal attacks and not a shred of reason, evidence, or examples to support your position. I have provided examples (large and small companies including 5 in biotech), commonly known and accepted reasons and recent news related to this topic all showing the positive effects of insider purchases. With the following concrete evidence, I will rest my case and put you on ignore. I think with your last post, you lost the reapect of most readers on this board. Multiple academic studies show positive correlation between insider purchases and stock returns (see link below): "At the level of individual firms, Lakonishok and Lee concluded that insider activity can predict stock returns.They found that stocks with extensive insider purchases outperformed those with extensive sales. However, they stated that insider purchases are more informative than insider sales. "Research showed that long-term positive (negative) excess returns existed afterinsider purchase (sale) transactions. It also showed that multiple trades by different insiders in the same direction led to higher excess returns." https://www.2iqresearch.com/blog/profiting-from-insider-transactions-a-review-of-the-academic-research