Investors closely monitor insider buys, as they can deliver a positive message to shareholders, reflecting overall business confidence.Of course, many strict rules apply to insiders.Insiders can’t trade based on material nonpublic information, they must pre-clear all trades, and all transactions of the company’s stock must occur during the Window Period.In addition, insiders have a longer holding period than most, a critical aspect that investors should be aware of.Three companies – Cummins (CMI) , Packagin ...