Stock (equity, capital stock) is a security that represents how the ownership of a corporation is divided. A unit of stock is a share. Owning shares means fractional ownership of a corporation. Corporations sell stock to raise capital. As a shareholder (stockholder) you may claim a part of a corporation’s assets but being a shareholder does not mean owning the company itself. That also limits your liabilities. Choosing the right stock to hold for the long or short term is not an easy task and requires extensive work, research, and analysis. You should choose stocks based on your own preferences — after completing due diligence — and not rely solely on the research presented below.