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A stock trader refers to a person or entity engaging in the trading of equity securities, in the capacity of agent, hedger, arbitrageur, speculator, or investor. The majority of stock traders are technically stock speculators, synonym stockjobbers (LSE). Stock speculators are often ambiguously referred to as stock traders in the public eye, usually to appear less intrusive, as since the beginning of our capital markets, North America has a long and colorful history of persecuting wall street speculators, simply for being speculators . A stock investor is an individual or firm who puts money to use by the purchase of equity securities, offering potential profitable returns, as interest, income, or appreciation in value (capital gains). This buy-and-hold long term strategy is passive in nature, as opposed to speculation, which is typically active in nature. Many stock speculators will trade bonds (and possibly other financial assets) as well. Stock speculation is a risky and complex occupation because the direction of the markets are generally unpredictable and lack transparency, also financial regulators are sometimes unable to adequately detect, prevent and remediate irregularities committed by malicious listed companies or other financial market participants. In addition, the financial markets are usually subjected to speculation.
Stock speculator vs stock investor 
Stock speculators are often ambiguously categorized as stock traders, if trading in that capacity, as it sounds more acceptable to the general public. Individuals or firms trading equity (stock) on the stock markets as their principal capacity are often called stock traders. Stock speculators usually try to profit from short-term price volatility with trades lasting anywhere from several seconds to several weeks.
The stock speculator is usually a professional. Persons can call themselves full or part-time stock traders/investors while maintaining other professions. When a stock speculator/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 venture capital, equity investment, fund management, and wealth management. These organized investors, are sometimes referred to as institutional investors. Several different types of stock trading strategies or approaches exist including day trading, trend following, market making, scalping (trading), momentum trading, trading the news, and arbitrage.
On the other hand, stock investors are firms or individuals who purchase stocks with the intention of holding them for an extended period of time, usually several months to years, for passive income objectives such as dividend accumulation. They rely primarily on fundamental analysis for their investment decisions and fully recognize stock shares as part-ownership in the company. Many investors believe in the buy and hold strategy, which as the name suggests, implies that investors will buy stock ownership in a corporation and hold onto those stocks for the very long term, generally measured in years. This strategy was made popular in the equity bull market of the 1980s and 90s where buy-and-hold investors rode out short-term market declines and continued to hold as the market returned to its previous highs and beyond. However, during the 2001-2003 equity bear market, the buy-and-hold strategy lost some followers as broader market indexes like the NASDAQ saw their values decline by over 60%.[dubious ]
Stock trading as a profession/career 
Stock traders advise shareholders and help manage portfolios. Traders engage in buying and selling bonds, stocks, futures and shares in hedge funds. A stock trader also conducts extensive research and observation of how financial markets perform. This is accomplished through economic and microeconomic study; consequently, more advanced stock traders will delve into macroeconomics and industry specific technical analysis to track asset or corporate performance. Other duties of a stock trader include comparison of financial analysis to current and future regulation of his or her occupation.
Professional stock traders who work for a financial company, are required to complete an internship of up to four months before becoming established in their career field. In the United States, for example, internship is followed up by taking and passing a Financial Industry Regulatory Authority-administered Series 63 or 65 exam. Stock traders who pass demonstrate familiarity with U.S. Securities and Exchange Commission (SEC) compliant practices and regulation. Stock traders with experience usually obtain a four-year degree in a financial, accounting or economics field after licensure. Supervisory positions as a trader may usually require an MBA for advanced stock market analysis.
The U.S. Bureau of Labor Statistics (BLS) reported that growth for stock and commodities traders was forecast to be greater than 21% between 2006 and 2016. In that period, stock traders would benefit from trends driven by pensions of baby boomers and their decreased reliance on Social Security. U.S. Treasury bonds would also be traded on a more fluctuating basis. Stock traders just entering the field suffer since few entry-level positions exist. While entry into this career field is very competitive, increased ownership of stocks and mutual funds drive substantial career growth of traders. Banks were also offering more opportunities for people of average means to invest and speculate in stocks. The BLS reported that stock traders had median annual incomes of $68,500. Experienced traders of stocks and mutual funds have the potential to earn more than $145,600 annually.
Risks and other costs 
Contrary to a stockbroker, a professional who arranges transactions between a buyer and a seller, and gets a guaranteed commission for every deal executed, a professional trader may have a steep learning curve and his/her ultra-competitive performance based career may be cut short, especially during generalized stock market crashes. Stock market trading operations have a considerably high level of risk, uncertainty and complexity, especially for unwise and inexperienced stock traders/investors seeking an easy way to make money quickly. In addition, trading activities are not free. Stock speculators/investors face several costs such as commissions, taxes and fees to be paid for the brokerage and other services, like the buying/selling orders placed at the stock exchange. Depending on the nature of each national or state legislation involved, a large array of fiscal obligations must be respected, and taxes are charged by jurisdictions over those transactions, dividends and capital gains that fall within their scope. However, these fiscal obligations will vary from jurisdiction to jurisdiction. Among other reasons, there could be some instances where taxation is already incorporated into the stock price through the differing legislation that companies have to comply with in their respective jurisdictions; or that tax free stock market operations are useful to boost economic growth. Beyond these costs are the opportunity costs of money and time, currency risk, financial risk, and internet, data and news agency services and electricity consumption expenses - all of which must be accounted for.
Noted cases - examples 
Both Jerome Kerviel (Société Générale) and Kweku Adoboli (UBS), two rogue traders, worked on the same type of position, the Delta One desk - a table where one does not exchange single stocks or bonds but derivatives. Those operations are relatively simple and often reserved for novice traders, who also specialize in exchange-traded funds (ETFs), financial products that mimic the performance of an index, upward or downward. Easy to use, they can diversify their portfolio by buying such contracts backed by a stock index or industry (e.g. commodities). Those two traders were very familiar to control procedures. They made a passage through the back office, the administrative body of the bank that controls the regularity of operations, before moving to trading. In 2005 and 2006, Kerviel had "led" by taking 100 to 150 million euros in positions on the shares of Solarworld AG listed in Germany, according to the report of the Inspector General of Societe Generale. Moreover – as Kerviel – the "unauthorized trading" of Kweku Adoboli did not date back a long way. Adoboli would have made some operations since October 2008 - his failure and subsequent arrest was in 2011.
Adolf Merckle, a German heir of a large business, stock investor and stock trader, a large stockholder of Phoenix Pharmahandel, generic drug manufacturer Ratiopharm, and large parts of cement company HeidelbergCement as well as vehicle manufacturer Kässbohrer, spent most of his time investing. In December 2008, believing that Porsche could not complete its takeover of Volkswagen and would have to sell its shares, Merckle and others bet against Volkswagen stock. But Porsche had quietly and effectively cornered Volkswagen stock, so short-sellers such as Merckle could not buy enough Volkswagen stock to cover their short positions. Volkswagen stock therefore quintupled in value in a single day, causing billions in losses for those who had bet against Volkswagen's share price. Faced with such losses, Merckle's cement company was unable to make payments on a huge loan taken out to purchase an English competitor, Hanson. In 2006, he was the world's 44th richest man, dropping to 96th place by December 2008, but still one of Germany's five richest men. He committed suicide on 5 January 2009.
Stock speculators and investors usually need a stock broker such as a bank or a brokerage firm to access the stock market. Since the advent of Internet banking, an Internet connection is commonly used to manage positions. Using the Internet, specialized software, and a personal computer, stock speculators/investors make use of technical and fundamental analysis to help them in making decisions. They may use several information resources, some of which are strictly technical. Using the pivot points calculated from a previous day's trading, they attempt to predict the buy and sell points of the current day's trading session. These points give a cue to speculators, as to where prices will head for the day, prompting each speculator where to enter his trade, and where to exit. An added tool for the stock picker is the use of "stock screens". Stock screens allow the user to input specific parameters, based on technical and/or fundamental conditions, that he or she deems desirable. Primary benefit associated with stock screens is its ability to return a small group of stocks for further analysis, among tens of thousands, that fit the requirements requested. There is criticism on the validity of using these technical indicators in analysis, and many professional stock speculators do not use them. Many full-time stock speculators and stock investors, as well as most other people in finance, traditionally have a formal education and training in fields such as economics, finance, mathematics and computer science, which may be particularly relevant to this occupation – since stock trading is not an exact science, stock prices have in general a random or chaotic behaviour and there is no proven technique for trading stocks profitably, the degree of knowledge in those fields is ultimately neglectable.
Stock picking 
The efficient-market hypothesis 
Although many companies offer courses in stock picking, and numerous experts report success through technical analysis and fundamental analysis, many economists and academics state that because of the efficient-market hypothesis (EMH) it is unlikely that any amount of analysis can help an investor make any gains above the stock market itself. In the distribution of investors, many academics believe that the richest are simply outliers in such a distribution (i.e. in a game of chance, they have flipped heads twenty times in a row). When money is put into the stock market, it is done with the aim of generating a return on the capital invested. Many investors try not only to make a profitable return, but also to outperform, or beat, the market. However, market efficiency - championed in the EMH formulated by Eugene Fama in 1970, suggests that at any given time, prices fully reflect all available information on a particular stock and/or market. Thus, according to the EMH, no investor has an advantage in predicting a return on a stock price because no one has access to information not already available to everyone else. In efficient markets, prices become not predictable but random, so no investment pattern can be discerned. A planned approach to investment, therefore, cannot be successful. This "random walk" of prices, commonly spoken about in the EMH school of thought, results in the failure of any investment strategy that aims to beat the market consistently. In fact, the EMH suggests that given the transaction costs involved in portfolio management, it would be more profitable for an investor to put his or her money into an index fund.
At the academic level, the very concept of market timing (the act of attempting to predict the future direction of the market, typically through the use of technical indicators or economic data) is called into question by those who believe in the efficient market theory. This theory is based on the premise that, at any given time, prices fully reflect all available information on a particular stock and/or market. Thus, no investor has an advantage in predicting a return on a stock price because no one has access to information not already available to everyone else.
Mandelbrot's fractal theory 
In 1963 Benoit Mandelbrot analyzed the variations of cotton prices on a time series starting in 1900. There were two important findings. First, price movements had very little to do with a normal distribution in which the bulk of the observations lies close to the mean (68% of the data are within one standard deviation). Instead, the data showed a great frequency of extreme variations. Second, price variations followed patterns that were indifferent to scale: the curve described by price changes for a single day was similar to a month’s curve. Surprisingly, these patterns of self-similarity were present during the entire period 1900-1960, a violent epoch that had seen a Great Depression and two world wars. Mandelbrot used his fractal theory to explain the presence of extreme events in Wall Street. In 2004 he published his book on the “misbehavior” of financial markets - The (Mis)behavior of Markets: A Fractal View of Risk, Ruin, and Reward. The basic idea that relates fractals to financial markets is that the probability of experiencing extreme fluctuations (like the ones triggered by herd behavior) is greater than what conventional wisdom wants us to believe. This of course delivers a more accurate vision of risk in the world of finance. The central objective in financial markets is to maximize income for a given level of risk. Standard models for this are based on the premise that the probability of extreme variations of asset prices is very low. These models rely on the assumption that asset price fluctuations are the result of a well-behaved random or stochastic process. This is why mainstream models (such as the infamous Black-Scholes model) use normal probabilistic distributions to describe price movements. For all practical purposes, extreme variations can be ignored. Mandelbrot thought this was an awful way to look at financial markets. For him, the distribution of price movements is not normal and has the property of kurtosis, where fat tails abound. This is a more faithful representation of financial markets: the movements of the Dow index for the past hundred years reveals a troubling frequency of violent movements. Still, conventional models used by the time of the 2008 financial crisis ruled out these extreme variations and considered they can only happen every 10,000 years. An obvious conclusion from Mandelbrot’s work is that greater regulation in financial markets is indispensable. Other contributions of his work for the study of stock market behaviour are the creation of new approaches to evaluate risk and avoid unantecipated financial collapses.
Beating the market, fraud and scams 
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Outside of academia, the controversy surrounding market timing is primarily focused on day trading conducted by individual investors and the mutual fund trading scandals perpetrated by institutional investors in 2003. Media coverage of these issues has been so prevalent that many investors now dismiss market timing as a credible investment strategy. Unexposed insider trading, accounting fraud, embezzlement and pump and dump strategies are factors that hamper an efficient, rational, fair and transparent investing, because they may create fictitious company's financial statements and data, leading to inconsistent stock prices.
Throughout the stock markets history, there have been dozens of scandals involving listed companies, stock investing methods and brokerage. A classical case related to insider trading of listed companies involved Raj Rajaratnam and its hedge fund management firm - the Galleon Group. On Friday October 16, 2009, he was arrested by the FBI and accused of conspiring with others in insider trading in several publicly traded companies. U.S. Attorney Preet Bharara put the total profits in the scheme at over $60 million, telling a news conference it was the largest hedge fund insider trading case in United States history. A well publicized accounting fraud of a listed company involved Satyam. On January 7, 2009, its Chairman Raju resigned after publicly announcing his involvement in a massive accounting fraud. Ramalinga Raju was sent to the Hyderabad prison along with his brother and former board member Rama Raju, and the former CFO Vadlamani Srinivas. In Italy, Parmalat's Calisto Tanzi was charged with financial fraud and money laundering in 2008. Italians were shocked that such a vast and established empire could crumble so quickly. When the scandal was made known, the share price of Parmalat in the Milan Stock Exchange tumbled. Parmalat had sold itself credit-linked notes, in effect placing a bet on its own credit worthiness in order to conjure up an asset out of thin air. After his arrest, Tanzi reportedly admitted during questioning at Milan's San Vittore prison, that he diverted funds from Parmalat into Parmatour and elsewhere. The family football and tourism enterprises were financial disasters; as well as Tanzi's attempt to rival Berlusconi by buying Odeon TV, only to sell it at a loss of about €45 million. Tanzi was sentenced to 10 years in prison for fraud relating to the collapse of the dairy group. The other seven defendants, including executives and bankers, were acquitted. Another eight defendants settled out of court in September 2008.
Day trading sits at the extreme end of the investing spectrum from conventional buy-and-hold wisdom. It is the ultimate market-timing strategy. While all the attention that day trading attracts seems to suggest that the theory is sound, critics argue that, if that were so, at least one famous money manager would have mastered the system and claimed the title of "the Warren Buffett of day trading". The long list of successful investors that have become legends in their own time does not include a single individual that built his or her reputation by day trading.
Even Michael Steinhardt, who made his fortune trading in time horizons ranging from 30 minutes to 30 days, claimed to take a long-term perspective on his investment decisions. From an economic perspective, many professional money managers and financial advisors shy away from day trading, arguing that the reward simply does not justify the risk. Despite the controversy, market timing is neither illegal nor unethical. Attempting to make a profit is the reason investors invest, and buy low and sell high is the general goal of most investors (although short-selling and arbitrage take a different approach, the success or failure of these strategies still depends on timing).
The problems with mutual fund trading that cast market timing in a negative light occurred because the prospectuses written by the mutual fund companies strictly forbid short-term trading. Despite this prohibition, special clients were allowed to do it anyway. So, the problem was not with the trading strategy but rather with the unethical and unfair implementation of that strategy, which permitted some investors to engage in it while excluding others. All of the world's greatest investors rely, to some extent, on market timing for their success. Whether they base their buy/sell decisions on fundamental analysis of the markets, technical analysis of individual companies, personal intuition, or all of the above, the ultimate reason for their success involves making the right trades at the right time. In most cases, those decisions involve extended periods of time and are based on buy-and-hold investment strategies. Value investing is a clear example, as the strategy is based on buying stocks that trade for less than their intrinsic values and selling them when their value is recognized in the marketplace. Most value investors are known for their patience, as undervalued stocks often remain undervalued for significant periods of time.
Some investors choose a blend of technical, fundamental and environmental factors to influence where and when they invest. These strategists reject the 'chance' theory of investing, and attribute their higher level of returns to both insight and discipline.
Financial fail and unsuccessful stories related with stock trading abound. Trading stocks with consistent profitability is one of the most difficult occupations one can have[vague], with a failure rate estimated by most as at least 90% in short-term investing, like day trading strategies. One reason for this high failure rate is that most new traders start out with too little capital, and the expectation of being able to pay their bills with their trading profits. Another big reason for this high failure rate is that most new traders start without a coherent game plan or strategy to trade. Other major reasons are the unpredictability of the markets, especially in the short-term, the large number of corporate and financial scams and frauds among listed companies, and out-of-control erroneous advertisement and biased aggressive advertising campaigns related with trading, brokerage, stock picking strategies, and so on. Every year, a lot of money is wasted in non-peer-reviewed (and largely unregulated) publications and courses attended by credulous people that get persuaded and take the bill, hoping getting rich by trading on the markets. This allow widespread promotion of inaccurate and unproven trading methods for stocks, bonds, commodities, or Forex, while generating sizable revenues for unscrupulous authors, advisers and self-titled trading gurus. Most active money managers produce worse returns than an index, such as the Standard & Poor's 500.
Speculation in stocks is a risky and complex occupation because the direction of the markets are generally unpredictable and lack transparency, also financial regulators are sometimes unable to adequately detect, prevent and remediate irregularities committed by malicious listed companies or other financial market participants. In addition, the financial markets are usually subjected to speculation. This does not invalidate the well documented true and genuine stories of large success and consistent profitability of many individual stock investors and stock investing organizations along the history.
See also 
- Jill Treanor, Trading tactics: Soc Gen's Jérôme Kerviel and UBS's Kweku Adoboli, The Guardian (15 September 2011)
- Dougherty, Carter (7 January 2009). "Facing Losses, Billionaire Takes His Own Life". The New York Times. Retrieved 2009-01-06.
- Mandelbrot, Benoît B.; Hudson, Richard L. (2004). The (Mis)behavior of Markets: A Fractal View of Risk, Ruin, and Reward. New York: Basic Books.
- "SEC Charges Billionaire Hedge-Fund Manager with Insider Trading – Dispatch – WSJ". The Wall Street Journal. 2009-10-16. Retrieved 2010-08-11.
- Italian dairy boss gets 10 years
- Don’t follow Buffett because you can’t, Reuters (August 24, 2012)
- Alice Schroeder, the author of “The Snowball: Warren Buffett and the Business of Life”, Schroeder: Days of Easy Money End for Fund Managers, Bloomberg (Jan 19, 2012)