Buying and Selling shares can earn you a vast amount of money but where there are big rewards there are also twice as many risks as the prices on the stock markets are always changing and the smallest piece of news could have massive effects on the share prices. Mining and Exploration companies can offer high returns if their digs or drills find what they are looking for and the share price can jump up 100% like Rockhopper Exploration PLC or Gulf Keystone Petroleum are good examples of companies that have been successful.
