Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online.Individuals or firms trading equity (stock) on the stock markets as their principal capacity are called stock traders. Stock traders usually try to profit from short-term price volatility with trades lasting anywhere from several seconds to several weeks. The stock trader is usually a professional. Persons can call themselves full or part-time stock traders/investors while maintaining other professions. When a stock trader/investor has clients, and acts as a money manager or adviser with the intention of adding value to their clients finances, he is also called a financial advisor or manager. In this case, the financial manager could be an independent professional or a large bank corporation employee. This may include managers dealing with investment funds, hedge funds, mutual funds, and pension funds, or other professionals in equity investment, fund management, and wealth management. Several different types of stock trading exist including day trading, swing trading, market making, scalping (trading), momentum trading, trading the news, and arbitrage.