Stock: "a type of security that signifies ownership in a corporation and represents a claim on part of the corporation's assets and earnings.
A holder of stock (a shareholder) has a claim to a part of the corporation's assets and earnings. In other words, a shareholder is an owner of a company. Ownership is determined by the number of shares a person owns relative to the number of outstanding shares. For example, if a company has 1,000 shares of stock outstanding and one person owns 100 shares, that person would own and have claim to 10% of the company's assets." (investopedia)
How do you make money from trading stocks?
The simplest example: You buy 100 shares of XYZ for $1.00. In two weeks, you look back at your portfolio, and see that the price of the underlying stock has gone from $1.00 to $2.00. You then sell all 100 shares for $2.00. Your return on investment would be 100%. haha
Simple enough right?
No, it's a lot harder than that. But, I'll touch up on the rest later.