Companies that have good track record always tried to maintaining it and that is why they don't go outside the boundary in terms of reward or return on investment for most of these companies that promise high-yield investment return mostly end up to be scam.Investment in any viable company that will guarantee profit at the end of the day,is what any investor would go for.But one thing about those esterblished compenies with proven track record and sound managerial team is that the shares you are allowed to buy will be too small to fetch you large returns,unless you have much funds to finance the company.