Day trading is a form of speculation in securities in which a trader buys and sells a financial instrument within the same trading day, so that all positions are closed before the market closes for the trading day to avoid unmanageable risks and negative price gaps between one day's close and the next day's price at the open. Traders who trade in this capacity are generally classified as speculators. Day trading contrasts with the long-term trades underlying buy-and-hold and value investing strategies. Day trading may require fast trade execution, sometimes as fast as milli-seconds in scalping, therefore direct-access day trading software is often needed.
Program trading is a type of trading in securities, usually consisting of baskets of fifteen stocks or more that are executed by a computer program simultaneously based on predetermined conditions. Program trading is often used by hedge funds and other institutional investors pursuing index arbitrage or other arbitrage strategies. There are essentially two reasons to use program trading, either because of the desire to trade many stocks simultaneously, or alternatively to arbitrage temporary price discrepancies between related financial instruments, such as between an index and its constituent parts.
Algorithmic trading is a method of executing orders using automated pre-programmed trading instructions accounting for variables such as time, price, and volume. This type of trading attempts to leverage the speed and computational resources of computers relative to human traders. In the twenty-first century, algorithmic trading has been gaining traction with both retail and institutional traders. A study in 2019 showed that around 92% of trading in the Forex market was performed by trading algorithms rather than humans.
An automated trading system (ATS), a subset of algorithmic trading, uses a computer program to create buy and sell orders and automatically submits the orders to a market center or exchange. The computer program will automatically generate orders based on predefined set of rules using a trading strategy which is based on technical analysis, advanced statistical and mathematical computations or input from other electronic sources.
In finance, a dark pool is a private forum for trading securities, derivatives, and other financial instruments. Liquidity on these markets is called dark pool liquidity. The bulk of dark pool trades represent large trades by financial institutions that are offered away from public exchanges like the New York Stock Exchange and the NASDAQ, so that such trades remain confidential and outside the purview of the general investing public. The fragmentation of electronic trading platforms has allowed dark pools to be created, and they are normally accessed through crossing networks or directly among market participants via private contractual arrangements. Generally, dark pools are not available to the public, but in some cases, they may be accessed indirectly by retail investors and traders via retail brokers.
BATS Global Markets is a global stock exchange operator founded in Lenexa, Kansas, with additional offices in London, New York, Chicago, and Singapore. BATS was founded in June 2005, became an operator of a licensed U.S. stock exchange in 2008 and opened its pan-European stock market in October 2008. As of February 2016, it operated four U.S. stock exchanges, two U.S. equity options exchanges, the pan-European stock market, and a global market for the trading of foreign exchange products. BATS was acquired by Cboe Global Markets in 2017.
High-frequency trading (HFT) is a type of algorithmic trading in finance characterized by high speeds, high turnover rates, and high order-to-trade ratios that leverages high-frequency financial data and electronic trading tools. While there is no single definition of HFT, among its key attributes are highly sophisticated algorithms, co-location, and very short-term investment horizons in trading securities. HFT uses proprietary trading strategies carried out by computers to move in and out of positions in seconds or fractions of a second.
The May 6, 2010, flash crash, also known as the crash of 2:45 or simply the flash crash, was a United States trillion-dollar flash crash which started at 2:32 p.m. EDT and lasted for approximately 36 minutes.
Scott Patterson is an American financial journalist and bestselling author. He is a staff reporter at The Wall Street Journal and author of Dark Pools: High-Speed Traders, A.I. Bandits, and the Threat to the Global Financial System and The New York Times bestselling bookThe Quants.
Virtu Financial is an American company that provides financial services, trading products and market making services. Virtu provides product suite including offerings in execution, liquidity sourcing, analytics, broker-neutral, multi-dealer platforms in workflow technology and two-sided quotations and trades in equities, commodities, currencies, options, fixed income, and other securities on over 230 exchanges, markets, and dark pools. Virtu uses proprietary technology to trade large volumes of securities. The company went public on the Nasdaq in 2015.
Flash Boys: A Wall Street Revolt is a book by the American writer Michael Lewis, published by W. W. Norton & Company on March 31, 2014. The book is a non-fiction investigation into the phenomenon of high-frequency trading (HFT) in the US financial market, with the author interviewing and collecting the experiences of several individuals working on Wall Street. Lewis concludes that HFT is used as a method to front run orders placed by investors. He goes further to suggest that broad technological changes and unethical trading practices have transformed the U.S. stock market from "the world's most public, most democratic, financial market" into a "rigged" market.
Investors Exchange (IEX) is a stock exchange in the United States. It was founded in 2012 in order to mitigate the effects of high-frequency trading. IEX was launched as a national securities exchange in September 2016. On October 24, 2017, it received regulatory approval from the U.S. Securities and Exchange Commission (SEC) to list companies. IEX listed its first public company, Interactive Brokers, on October 5, 2018. The exchange said that companies would be able to list for free for the first five years, before a flat annual rate of $50,000. On September 23, 2019, it announced it was leaving its listing business.
Tactical Hybrid Order Router is an electronic trading platform that manages securities orders in order to dodge certain tactics used in high-frequency trading. The program was created by Allen Zhang while working for the Royal Bank of Canada (RBC) in a team led by Brad Katsuyama.
In finance, quote stuffing refers to a form of market manipulation employed by high-frequency traders (HFT) that involves quickly entering and withdrawing a large number of orders in an attempt to flood the market. This can create confusion in the market and trading opportunities for high-speed algorithmic traders. The term is relatively new to the financial market lexicon and was coined by Nanex in studies on HFT behavior during the 2010 Flash Crash.
Ronan Ryan is an Irish-American businessperson. He is the president of IEX, the Investor's Exchange, and an electronic trading expert. As a founding member of IEX, Ryan was a central character featured in Michael Lewis’ Flash Boys: A Wall Street Revolt. Irish America magazine named Ryan to its 2014 and 2015 Wall Street 50 list.
Interactive Brokers, Inc. (IB), headquartered in Greenwich, Connecticut, is an American multinational brokerage firm which operates the largest electronic trading platform in the United States by number of daily average revenue trades. In 2023, the platform processed an average of 3 million trades per trading day. Interactive Brokers is the largest foreign exchange market broker and is one of the largest prime brokers servicing commodity brokers. The company brokers stocks, options, futures contracts, exchange of futures for physicals, options on futures, bonds, mutual funds, currency, cryptocurrency, contracts for difference, derivatives, and event-based trading contracts on election and other outcomes. Interactive Brokers offers direct market access, omnibus and non-disclosed broker accounts, and provides clearing services. The firm has operations in 34 countries and 27 currencies and has 2.6 million institutional and individual brokerage customers, with total customer equity of US$426 billion as of December 31, 2023. In addition to its headquarters in Greenwich, on the Gold Coast of Connecticut, the company has offices in major financial centers worldwide. More than half of the company's customers reside outside the United States, in approximately 200 countries.
Hudson River Trading is a quantitative trading firm headquartered in New York City and founded in 2002. In 2014, it accounted for about 5% of all trading in the United States. Hudson River Trading employs over 800 people in offices around the world, including New York, Chicago, Austin, Boulder, London, Singapore, Shanghai, Mumbai and Dublin. The firm focuses on research and development of automated trading algorithms using mathematical techniques, and trades on over 100 markets worldwide.
Spoofing is a disruptive algorithmic trading activity employed by traders to outpace other market participants and to manipulate markets. Spoofers feign interest in trading futures, stocks, and other products in financial markets creating an illusion of the demand and supply of the traded asset. In an order driven market, spoofers post a relatively large number of limit orders on one side of the limit order book to make other market participants believe that there is pressure to sell or to buy the asset.
Citadel Securities LLC is an American market making firm providing liquidity and trade execution to retail and institutional clients, headquartered in Miami. The firm also trades futures, equities, credit, options, currencies, and Treasury bonds. It is the largest designated market maker on the New York Stock Exchange.
A securities information processor (SIP) is a part of the infrastructure of public market data providers in the United States that process, consolidate, and disseminate quotes and trade data from different US securities exchanges and market centers. An important purpose of the SIPs for US securities is to publish the prevailing National Best Bid Offer (NBBO).
