Insider purchases

Insider purchases and sales are noteworthy milestones but no road map to investing success.

You're building a mosaic to decide whether you want to be invested in a company, this is just one piece of the puzzle.

But be careful before you follow in a CEO's footsteps. Knowing how much stock to put into an insider's actions, literally and figuratively, is a tricky business.

The most important aspect that the lay investor should keep in mind is that it is a first screen. Despite that caveat, though, "it's the best one that I know of".

When you see an executive put large sums of money on the line, clearly that's a signal that he feels very confident, but that doesn't necessarily mean that the stock's going to go up.

Some insider buying maybe just simply window dressing or a statement to investors.

It's possible that smaller purchases could be aimed largely at drumming up more buying.

They may hope that the publicity of their having bought will have a positive effect on the direction of the market price.