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.