IEX
| Company type | Private |
|---|---|
| Industry | Financial services, Stock exchange |
| Founded | 2012 |
| Founder | Brad Katsuyama, Ronan Ryan |
| Headquarters | New York City , United States |
Key people | Brad Katsuyama (CEO), Ronan Ryan (President) |
| Products | Stock exchange services, IEX Cloud (discontinued 2024) |
| Website | iextrading |
The Investors Exchange (IEX) is an American stock exchange established in 2012 with the objective of mitigating issues related to high-frequency trading. It commenced operations as a national securities exchange in September 2016 and secured SEC authorization to list companies by October 2017. IEX’s inaugural public listing was Interactive Brokers in October 2018, initially providing complimentary listings for five years before implementing a fixed annual fee of $50,000. Nevertheless, by September 2019, IEX withdrew from the corporate listing sector to concentrate exclusively on its primary trading platform.
That same year marked a key leadership change when co-founder and COO John Schwall announced his retirement.
The exchange’s foundation and unique market positioning are extensively covered in Michael Lewis’s 2014 publication Flash Boys: A Wall Street Revolt, which emphasizes its pioneering approach designed to improve market integrity and transparency.
Establishment and inaugural trading
IEX was created in 2012 by Brad Katsuyama and Ronan Ryan, with trading activities beginning on October 25, 2013. Its main office is located at 3 World Trade Center in New York City, while the matching engine operates out of Weehawken, New Jersey, with initial data infrastructure based in Secaucus, New Jersey. A hallmark innovation of IEX is its deployment of a 38-mile optical fiber coil that generates a deliberate 350-microsecond "speed bump," designed to counteract the speed advantages exploited by high-frequency traders. This concept was subsequently adopted by other exchanges such as NYSE American following regulatory approval from the SEC.
In 2020, Caisse de dépôt et placement du Québec made a strategic capital injection into IEX Group, strengthening its financial position.
Regulatory milestones
On June 17, 2016, the SEC granted IEX official exchange status. Later that year, Sara Furber, formerly a managing director at Morgan Stanley, was recruited to spearhead the exchange’s listing initiatives, reporting directly to Katsuyama. The company aimed to launch public listings during 2017.
Following a regulatory review lasting over a year, IEX obtained SEC approval on October 24, 2017, to list securities. It sought to attract issuers by offering significantly lower fees than established exchanges—providing free listings for an initial five-year period followed by a flat $50,000 annual fee, compared with fees reaching up to $500,000 at NYSE and $155,000 at Nasdaq. This positioned IEX as the first major challenger to NYSE and Nasdaq since 2008. At that time, Wynn Resorts was the only publicly known company considering listing on IEX.
Demonstrating its industry impact and innovative approach, IEX received the 2025 Global Markets Choice Award for 'Most Innovative Exchange.'
Core operational philosophy
IEX was launched to confront problematic trading behaviors prevalent on Wall Street exchanges, dark pools, and alternative trading platforms. Its strategy centers on fostering transparency and fairness to draw investors while creating equitable conditions for all market participants. Fundamental operational tenets include:
- Public disclosure of its electronic order matching engine’s rules.
- Limiting available order types to a straightforward and familiar set.
- Applying fixed fees on most orders or a flat percentage fee for smaller orders.
- Delivering market pricing data simultaneously across all external access points.
- Implementing a modest delay in market data dissemination without permitting colocation.
- Rejecting payments for order flow.
These policies serve to enhance confidence in the exchange. Unlike certain dark pools affiliated with trading firms that compensate for specific order types, IEX imposes a uniform charge of $0.0009 per share for trades executed within its dark pool (or 0.30% for shares priced below $1.00), with reduced fees applied when trades are routed externally.
The platform supports five order types: market orders, limit orders, primary peg orders (pegged to the national best bid or offer), midpoint peg orders, and a proprietary discretionary peg order capable of executing at prices up to midpoint when quotes remain stable. This streamlined selection represents fewer options than most competing exchanges provide.
A defining aspect of IEX’s model is its New Jersey-based 38-mile fiber optic coil that produces a deliberate 350-microsecond latency "speed bump," equalizing data delivery times and hindering predatory trading strategies. In contrast to competitors allowing colocation near their servers, IEX prohibits such proximity for trader equipment. It maintains ultra-low latency connections with other trading venues in the New York area, enabling executions within under 320 microseconds; meanwhile, the inherent round-trip delay of approximately 700 microseconds from the fiber coil ensures no trader can outpace IEX’s internal systems. This delay mechanism effectively discourages tactics like liquidity fading—where high-frequency traders withdraw liquidity upon detecting incoming orders.
These operational choices solidify IEX’s competitive position by advancing market fairness and transparency.
Broker priority
Prior to its transition into an exchange, IEX functioned as a dark pool that prioritized orders first by price, followed by broker, and lastly by time. This approach contrasted with other U.S. trading platforms, which typically rank orders solely by price and then time. Brad Katsuyama, the founder, implemented this system to shield everyday investors from high-frequency trading (HFT) firms that could leapfrog the queue and engage in front-running.
After achieving exchange status, IEX shifted to the conventional priority framework—prioritizing best price first, then order entry time—thereby conforming to prevailing industry standards.
Liquidity
The platform was spotlighted in Michael Lewis' book, Flash Boys, which portrayed IEX as an innovative trading venue aimed at fostering a more equitable market. By deliberately reducing trading speeds, IEX sought to deter HFT front-running tactics and promote greater market fairness for investors.
Conversely, some market participants contend that rapid execution and direct connectivity are crucial for liquidity providers to effectively manage their risks. They argue that IEX’s slower trading environment might diminish liquidity availability and elevate costs associated with price discovery.
IEX Cloud
IEX Cloud offered an API service granting access to stock data from the U.S. and Canada, catering to developers and financial technology applications within its suite of products.
In August 2024, IEX Cloud was discontinued, reflecting a strategic realignment in the company’s approach to data services.
Key people
- Brad Katsuyama (CEO)
- Ronan Ryan (President)
See also
External links
- Articles with short description
- 2012 establishments in New York City
- American companies established in 2012
- Economy of New York City
- Financial services companies based in New York City
- Financial services companies established in 2012
- Private equity portfolio companies
- Privately held companies based in New York City
- Stock exchanges in the United States
- Companies of the United States by year of establishment
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