Common Shares
WHAT THEY ARE
When you buy common shares you become a part owner of the company. You will share in the profits of the company if it does well, either by seeing the value of your shares rise, by being paid dividends out of the firm's profit, or both. If the business performs badly, you probably won't get any dividends and the value of your shares will drop.
HOW THEY WORK
Companies have two basic choices when they want to raise money. They can borrow or they can sell ownership or equity in the business to investors. Companies sell shares to investors in what's called an initial public offering (IPO). If the company needs to sell more shares later to raise cash, it's called a secondary offering.
After a company has sold shares to investors the shares may be listed on a secondary market such as a stock exchange. Trading of shares on a stock exchange is between investors and the company doesn't see any of the money.
The price you pay for shares is essentially set by supply and demand forces. The more people who want the shares, the higher the price will be. Ideally, you want to buy a stock that is going to be in high demand after you buy it.
There are many reasons why a stock might be in high demand. The most important is the company's ability to make bigger profits. As a shareholder, you have the right to share in the company's profits. The more money the company has left after it has paid all its debts, the more your share of the company will be worth.