Citadel Investment Group v. Teza Technologies

CourtAppellate Court of Illinois
DecidedFebruary 24, 2010
Docket1-09-2828 Rel
StatusPublished

This text of Citadel Investment Group v. Teza Technologies (Citadel Investment Group v. Teza Technologies) is published on Counsel Stack Legal Research, covering Appellate Court of Illinois primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Citadel Investment Group v. Teza Technologies, (Ill. Ct. App. 2010).

Opinion

THIRD DIVISION February 24, 2010

No. 1-09-2828

CITADEL INVESTMENT GROUP, LLC, ) Appeal from the ) Circuit Court of Plaintiff - Appellant and Cross-Appellee, ) Cook County. ) v. ) 09 CH 22478 ) TEZA TECHNOLOGIES LLC, a Delaware ) Corporation, MIKHAIL MALYSHEV, and ) JACE KOHLMEIER, ) Honorable ) Mary K. Rochford, Defendants - Appellees and ) Judge Presiding. Cross-Appellants. )

JUSTICE STEELE delivered the opinion of the court:

Following an evidentiary hearing, plaintiff Citadel Investment Group, LLC (Citadel), filed

this interlocutory appeal pursuant to Illinois Supreme Court Rule 307(a)(1) (188 Ill. 2d R.

307(a)(1)), seeking reversal of the portion of the circuit court’s order which granted preliminary

injunctive relief lasting only through November 16, 2009, against defendant Mikhail Malyshev and

through November 17, 2009, against defendants Jace Kohlmeier and Teza Technologies, LLC

(Teza), and requesting a remand for the entry of an injunction of appropriate length. Defendants

cross-appealed, contending that the circuit court erred in failing to dismiss the case and in entering

a preliminary injunction because its ruling prevents the defendants from competing, and adopts an

interpretation of the noncompetition agreements that violates public policy. For the following

reasons, we affirm. 1-09-2828

BACKGROUND

Citadel

Citadel is a Chicago-based financial services firm founded in 1990 by Ken Griffin. Citadel

has approximately 1,300 employees across the world, with 1,000 in Chicago. Citadel is best

known for its alternative investment management products and manages approximately $14 billion

of aggregate capital on behalf of pensions, retirement funds, foundations, endowments, and

employees of Citadel. Citadel provides some traditional, fundamental investments through its

global equities strategies. Citadel is also involved in quantitative investment, including: options

market making, volatility arbitrage, statistical arbitrage and high frequency trading. Citadel was

one of the first investment firms to engage in high frequency trading, which grew out of Citadel’s

work in statistical arbitrage. Citadel had been working on statistical arbitrage strategies for seven

years at the time it started working on high frequency trading.

A high frequency business consists of several interrelated parts, each of which is

important: (a) recruiting and hiring high frequency talent; (2) building historical market data

systems and parsers; (c) developing trading signals; (d) testing those signals against the collected

historical market data; (e) creating realtime market data interfaces that permit the collection of

data and the operation of trading strategies; (f) locating servers in strategic “co-location”

exchanges; and (g) developing order entry and trading “engines.” Combined, these activities

include both developing the tools to trade and building the tools to identify appropriate trades.

Building a high frequency trading business requires finding the best personnel possible to

perform overlapping work in information technology and quantitative research (QR)

2 1-09-2828

infrastructure. Recruiting and retaining employees is a critical and competitive portion of

Citadel’s high frequency business.

High frequency trading also requires the development of a vast collection of historical

market data. Citadel has been gathering market data since it began the high frequency business,

which was built on the foundation of Citadel’s prior quantitative investment work. The data

system contains the rough equivalent of approximately 100 times the amount of data included in

the Library of Congress. In order to use the historical market data, codes and programs must be

written to translate, organize and replay it. This process involves writing code to review and

organize the data into a coherent and usable format. Market data replayers allow a particular

signal or “alpha”1 to be tested over historical market data. Citadel developed these tools in

building its high frequency business. A combination of signals or “alphas” may be used in a

trading strategy.

Moreover, Citadel built trading engines that read incoming real-time market data and,

when the opportunity arises, execute its trading strategies and alphas to buy and sell securities.

This is a critical piece of the infrastructure and of the entire interrelated network.

There is significant overlap and cooperation in Citadel’s high frequency group between

individuals working on development of alphas or signals and other quantitative research and those

working on information technology, trading engines, and other aspects of the infrastructure.

Citadel’s quantitative and infrastructure teams have worked together in a continuous, cooperative

1 Signals or “alphas” are mathematical price prediction algorithms or models developed and

tested by Citadel.

3 1-09-2828

process to develop the high frequency business over a period from 2004 through 2009.

Malyshev and Kohlmeier

Malyshev joined Citadel’s high frequency group in the fall of 2003. Although he had no

training or professional trading experience or training, he had a Ph.D in plasma physics, had

previously worked as a management consultant, and had a quantitative background. Kohlmeier

was hired into Citadel’s finance technology associates program in the information technology (IT)

department in July 2002, directly out of graduate school. Kohlmeier joined the high frequency

group in January 2004. Prior to joining Citadel, Kohlmeier had no experience in algorithmic or

high frequency trading.

Malyshev oversaw every aspect of Citadel’s high frequency business, including the

building of the IT infrastructure for the high frequency business. Kohlmeier reported to Malyshev

from early 2004 until Malyshev resigned in February 2009. Additionally, Malyshev was

responsible for recruiting and hiring Citadel’s high frequency talent, interfacing with both internal

and external recruiters used by Citadel.

Malyshev also worked on Citadel’s alphas and was responsible for approving the trading

strategies used by Citadel’s high frequency group. Kohlmeier made sure the alphas “traded right”

and that trading was “robust.” While at Citadel, Kohlmeier would often make use of an “alpha”

that looked at a weighted midprice and had some predictive elements to it.

Joe Kelley, Richard May, and Brian Stube (as well as three others) reported directly to

Kohlmeier and also worked on Citadel’s alphas and signals. Kohlmeier conducted weekly

meetings with them which included technical discussions of the signals and strategies being

4 1-09-2828

worked on by individuals in the group.

Kohlmeier wrote the code for the Phase Zero HFE System at Citadel, which was the high

frequency group’s first order entry system and trading engine. The Phase Zero HFE System was

based on infrastructure previously used by Citadel to send orders back and forth to trade Korean

options. Kohlmeier made changes to that IT system so that it would allow the high frequency

group to trade on the National Association of Securities Dealers Automated Quotation System

(NASDAQ). The high frequency group made trades through Kohlmeier’s Phaze Zero HFE

System though, according to Kohlmeier, those trades lost a small amount of money and the

system was “turned off.”

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