The secret of Warren Buffett’s extraordinary success comes from his basic rule in investing: never lose money. There are a variety of investment options like stocks, debentures, bonds, and mutual funds which is what helps make the person confused. Knowing what to offer on a property is necessary in order to even stay running The Intelligent Investor a business for long. In any business, profit planning , cost control and decision making require an knowledge of the characteristics of costs as well as their behavior at different operating levels. Budget limit affects strongly firms’ investment.