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Dark Pools: The Rise of the Machine Traders and the Rigging of the U.S. Stock Market

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A news-breaking account of the global stock market's subterranean battles, Dark Pools portrays the rise of the "bots"- artificially intelligent systems that execute trades in milliseconds and use the cover of darkness to out-maneuver the humans who've created them.
In the beginning was Josh Levine, an idealistic programming genius who dreamed of wresting control of the market from the big exchanges that, again and again, gave the giant institutions an advantage over the little guy. Levine created a computerized trading hub named Island where small traders swapped stocks, and over time his invention morphed into a global electronic stock market that sent trillions in capital through a vast jungle of fiber-optic cables.
By then, the market that Levine had sought to fix had turned upside down, birthing secretive exchanges called dark pools and a new species of trading machines that could think, and that seemed, ominously, to be slipping the control of their human masters.
Dark Pools is the fascinating story of how global markets have been hijacked by trading robots--many so self-directed that humans can't predict what they'll do next.

368 pages, Hardcover

First published January 1, 2012

521 people are currently reading
6912 people want to read

About the author

Scott Patterson

37 books214 followers
I'm the author of a new book called Dark Pools, as well as a New York Times best-seller called The Quants. I'm a reporter for The Wall Street Journal, covering financial regulation from Washington, D.C. I've also written for the New York Times, Rolling Stone and Mother Earth News. I have a masters of arts degree from James Madison University and currently live in Alexandria, Virginia.

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Displaying 1 - 30 of 279 reviews
Profile Image for Kasey.
57 reviews7 followers
August 6, 2012
Upfront disclaimer. I work in the industry critiqued by this book.

Lets start with the good of this book. Patterson does a good job creating an entertaining narrative, telling the early days of electronic trading. While he isn't Michael Lewis, he does a passable run at the genre. The characters he introduces are interesting and he makes what could be a very boring subject easy to read about. The parts of this book where he talks about the early days of Datek and the Island electronic trading network are excellent. The story of how some very smart guys, with some very disruptive technology took on and beat one of the biggest good old boys networks in the world, is compelling and interesting.

Now for the bad. The first and most glaring problem with this book is that it is often factually incorrect. Not just with esoteric complicated details, but with basic easy to understand concepts. For instance he incorrectly describes how limit orders work. These are the most basic type of order in trading and have been around for decades.

The book is clearly biased against modern electronic trading, and really that isn't a big deal. It makes for a clear narrative, and because the bias is so obvious it doesn't feel underhanded even when the author uses sensational names for, what at the end of the day, are just computer programs. The real problem is that it appears that the main source for the authors "insider" information are people who were in electronic trading, but weren't very good at it. The story of the "abusive" order types is simply unbelievable. Here is an algo trader, whose strategy is highly sensitive to order execution, trading on complicated specialist electronic venues, who doesn't know about the order types they offer? Either that person is nearly criminally idiotic, or more likely, they are using those order types as an excuse to hide the more serious problem that their strategy is no good.

The author also gets lazy, bringing out the old straw men about the "average investor" being hurt, or whale orders being picked off. If he is talking about the middle income family with money in their 401k, there has never been a better time for them to invest in the stock market. Between large portfolio ETFs and broad index mutual funds (the only things the "average investor" should be in) the risk and cost have both gone down, at the same time as the world has become more volatile. The big fund managers are getting squeezed by the fact that they don't add much value, much more than by HFT. And big orderers can't have their cake and eat it too. The act of buying or selling a whole bunch of anything will change it's price. Those big orderers get to prepare ahead of time before they do it, and make a profit on this insider information. To also get to have perfect execution defies the laws of the market and would be worse for the "average" person.

In the end, the most disappointing thing about this book is that it hardly addresses the true problem with the markets these days. That is, why have we as a society set up a system where the best and brightest are rewarded most for what is essentially high speed poker? It's not a problem that some HFT firm is getting to make some money for providing liquidity to the market, its a problem that they hired half of MIT & Stanford to do it. A book exploring if and how we change the incentives for those really bright guys would be a welcome addition to the discussion. This is just a good if not terribly accurate yarn.
Profile Image for Chris.
11 reviews
June 18, 2014
hard to cut through the fluff to get to the facts, and the author's repeated breathless use of impressive-sounding facts ("7 *trillion* bytes") without context and meaningless but emotionally charged terms (just what is a "hunter-killer bot" is never explained) harms his credibility
6 reviews2 followers
July 12, 2014
Please applaud Scott Patterson, a daily newspaper journalist, for making the leap into book publishing. He stands above his colleagues for completing the marathon. “Dark Pools” is an accomplishment that must be praised for shedding light on a difficult topic to visualize.

But the book is a flawed product. Patterson’s book struggles to clearly express the harm deep within the plumbing of stock trading.
First the title is misleading. Dark pools are a just venue for financiers who make money on the buying and selling of stocks regardless of the underlying companies. People like Warren Buffett make money by buying and selling stocks they bet will be worth more in the future. When Buffett and the rest of us trade stocks, there are financiers who use superfast trading algorithms to profit from the transaction. Dark pools are a venue for this. Patterson writes broadly about the plumbing of stock trading, its financiers and the regulators who have tried to tame them. So the reader is confused before she flips open the cover.

Part of Patterson’s problem is his subject matter. The plumbing of stock trading is not visual. There’s no material for Patterson to launch into vivid descriptions and give the reader something to see. Patterson’s analogies help and he is good a breaking apart the pipes and codes to explain how systems work.

But another problem is that Patterson’s characters are pretty boring human beings. There is no way to tell if the guys Patterson writes about (and they are almost all men) were any different from bankers cooking up mortgage-backed securities. Also, he focuses on too many characters. He jumps quickly from character to character leaving the reader unsure which ones to invest effort in understanding.

Patterson does not help himself by delivering the reader a familiar story structure. What’s the angle here? Overcoming the monster? Quest? Rags to riches? If Patterson framed his book as a story instead of a chronological notebook dump, there would be greater reading pleasure. I’m certain the book would have sold better too.

Patterson also struggles to tell the readers how any of this stuff hurts them. Dark pools sound spooky and the financiers he writes about are hyenas who will eat each other, the American taxpayers or a wounded orphaned puppy indifferently.

But who lost money as a result of dark pools and high frequency trading? Who is hurt by the speed traders and dark pools? Patterson finally addresses the problem on page 276.

“Mom-and-pop investors innocently believed the stocks they owned were their stocks – not fizzing electronic bits of information to be toyed with by whiz kids running supercomputers. They had already seen Wall Street destroy trillions during the credit crisis in the previous few years. Now the math geniuses were tampering with the holdings in their 401(k)s.”

This paragraph says why dark pools and speed trading can be nefarious. This message gets lost in Patterson’s book. While “Dark Pools” does an admirable job shedding light on the issue, it fails to shed light on the problem. Further, the book lacks a narrative structure that would have made the reading more enjoyable.
Profile Image for Mike.
259 reviews8 followers
December 9, 2014
It started off well, wandered around a bit, found its theme again toward the end, and ultimately left no impact whatsoever.
Profile Image for Hugh Ashton.
Author 67 books64 followers
September 2, 2014
I'm giving this five stars - an honour I bestow on very few books. This is one of the scariest books I have read, as it explains the sham that is the financial industry today in some detail, in a way that can be understood by anyone prepared to exercise a little thought.

You can probably criticise this book on matters of small detail (misunderstanding of technical terms, over-focus on personalities, the fictitious "fly on the wall" style, etc.). Such criticisms miss the main thrust of the book, which explains principles, rather than attempting to be a "how-to" handbook for the HFT wannabe.

High-frequency trading (HFT) and the growth of private exchanges, and "dark pools" (where the details of transactions are not made public, except to a select few), along with the co-location of servers close to exchange matching engines, have all cost the average pension fund billions of dollars. And where's the money going? To the "traders", who sit behind the screens designed by (often Russian) techno-geniuses, who constantly find ways to game the system, without even knowing exactly why they are gaming the system.

I read this back-to-back with Michael Lewis' Flash Boys: A Wall Street Revolt, which takes a slightly different look at the same phenomenon. However, both look at the same basic idea - an attempt to make the business of equity trading (though it also applies to other securities) more transparent. In this story, though, it was clear that the first HFT system was doomed to be exploited by unscrupulous firms who used the technology in ways that were never intended, and instead of an open system, the US financial services industry descended into a morass of incomprehensible technology and double-speak.

Highly recommended if you want to see one reason why the global economy is where it is today.
Profile Image for Sam Padilla.
11 reviews
December 31, 2023
I picked up this book - perhaps wrongly - to learn more about electronic market structure. If that’s also your intent, this is definitely not the book for that. I dropped it having learned nothing new about dark pools or HFT.

I rarely drop books unfinished, but I had to drop this one 150 pages in. Here are some of the things I disliked the most about this book:

- The author is incredibly prolix. Some of his descriptive sentences take up nearly a third of a page. I often found myself skipping half of the paragraphs looking for the main arguments in the chapters.

- The book weirdly jumps in time at the beginning from the late 2000s to the early history of electronic trading. No solid narrative is formed throughout the chapters and parts.

- The author drags the historical narrative of electronic trading. I looked through and saw the book only starts discussing the market structure of the late 2000s after page 250. For a 300 ish page book, it is way too much time spent on a poorly narrated story.

If you want an okay description of the history of HFT in the 90s, then maybe this is your book. Though I think alternatives like Michael Lewis’ flashboys are better options.
Profile Image for Melinda.
2,049 reviews20 followers
May 26, 2017
There was so much information in this book I had to back and reread parts of it...and even so I still don't think I understood all of it. What a crazy, complex, sneaky, speedy life those traders and their algorithms and computers lead. I found this book equal parts fascinating and horrifying. I'm all for computers and machine learning, but some of this stuff is scary.

So much research must have gone into this book. Most of the info and concepts were explained well so that I - the dumb layman could mostly understand...but given I am not in the business, nor am I a mathematician, so there was a lot that I just don't think I would ever fully understand (but that's on me, not the author!)

All that aside - this was a grand read, I followed it pretty well and felt like I learned a fair bit about this topic along the way.
439 reviews
March 25, 2023
Dumb book.

Though Patterson has written competently for the WSJ (albeit often in collaboration & always under editorial supervision), Dark Pools, like his earlier book The Quants (2010), is more of a superficial survey of industry-insider views than an explanation of what's going on.

Patterson deploys a novelistic style of writing known as free indirect discourse, which licenses him to read the minds of characters that he's never met and to recount long-ago conversations that he never witnessed — all for the sake of creating the (undeserved, false) impression that readers are witnessing events in real-time, that the narrator knows what he's talking about.

Patterson depicts himself in these pages as a fly-on-the-wall who (undeservingly, falsely) thinks he's witnessing an epic battle between Good and Evil.

For the narrator, the forces of Good are "regular buy-and-hold investors" (201), "the Everyday Joe who was baffled by what had become of the market" (275), the "Mom-and-pop investors [who] innocently believed the stocks they owned were their stocks—not fizzing electronic bits of information to be toyed with by whiz kids running supercomputers" (275).

Evil, in contrast, is represented by the "powerful Bots" and "predator algos" who "communicate at warpspeeds" in a "placeless, faceless, postmodern cybermarket" (7).

Onto his imagined battlefield of Good vs Evil comes Patterson's hero, Haim Bodek, "an outsider who played by his own rules, a maverick who happened to have the mind of a world-class scientist" (30), who "often thought back to his rebellious days as a drummer in a thrash band, and the idealism he and his hacker pals had adopted in the early nineties, when a new vision about using technology to break apart the power structure of society had become a rallying cry" (34) [my emphases].

By this point, page 34, readers will likely have "often thought back to" why they decided to read this book.

Because "a revolution born from the idealistic belief that technology could shine a light on the dark forces of finance was being corrupted" (230) and because "the stock market ... has descended into one vast pool of darkness" (9), Patterson's hero has to stop the "escalat[ing] Algo Wars" from "threatening the very stability of the market itself" (186). "The industry wouldn't have a chance, Bodek thought, if someone didn't stick his neck out and start taking on the madness" (313).

Yes, indeed, stop the madness, stop reading this book, stop supporting (by your purchases) the proliferation of overdetermined fairy tale fantasies fueled by childhood recollections of Saturday morning bowls of sugary cold cereal and Star Wars-viewing marathons.

In a throwaway scene so corny it's laughable, Patterson describes a finance blogger as "a Wall Street insider who couldn't take all the bullshit anymore," whose "blog was breaking all the rules" (251).

Patterson's ridiculously over-the-top narrative tone make him sound like Comic-book store guy—that winsome loser who so often imagines himself in scenes like those in his beloved comic books.

Here's Patterson recounting an industry chieftain's speech to a large assembly of compatriots, with details presumably intended to guide a future movie director:

After Peterffy finished speaking, there was silence. Then a scattered handclap. And then the room burst into loud applause. Everyone realized: Peterffy had actually done it—he'd come out and said what so many were thinking, what they all knew deep down. The market was a complete mess. And the old guy was the only one with the balls to stand up and call a spade a spade (294) [my emphases].

At story's end Patterson avows that "Investors should be rewarded for their intelligence, for being able to make accurate predictions and take risk—not for knowing the location of secret holes inside the plumbing" (316).

Yes. Isn't it pretty to think so.
Profile Image for Vagabond of Letters, DLitt.
593 reviews411 followers
March 11, 2016
Some interesting information not present elsewhere mixed with outright error by an author with a talent for writing the form of narrative history. References and citations, even a bibliography or list of sources, is nonexistent. Many parts read more as rehashed newspaper headlines (and articles?) than well-written history. When the author speaks of subjects I have knowledge of, he often demonstrates a deep misunderstanding bordering on incompetence: too many stories are, I think, repeated by the author verbatim, without being subject to even a rudimentary application of that critical thought which is essential to writing and sifting history: in a word, he tows the party line - of several parties.

Technical details and information are often incorrect in a way that damages the coherence, credibility, and conclusions of the narrative, and are rarely contextualized by an author who demonstrates similar inability to understand basic computing as those whose testimonies he incorporates.

One should not attempt to write on a subject demanding expert treatment of some details without consulting experts: doubly so if the author is so out of his depth he can not tell a real expert from a fake, as the 'experts' relied on below.

An especially damning example is that of the retelling of the Aleynikov affair on pp 246-251 (Kindle), which is bordering on the libellous, and reads, again, as if torn from the headlines instead of carefully researched and constructed. 'He had intended to take so-called open source code, the kind freely available to anyone on the Internet and used by firms for basic computing functions....he swiped clear his computer's "bash" history, a record of activity on its hard drive [!] [sic]'. The entire telling of the story is confused, with good narrative drive but no historical spirit - no criticism, discernment, contextualization, or engagement.

The demonstrable misunderstandings of the author where he can be verified lend no confidence to those places where I can not: thus I can not recommend this book as history.

I am no fan of high-speed trading, and for those who wish to learn more of the subject from a critical perspective are instead advised to read Michael Lewis' 'Flash Boys' (popular history which is however competently researched and written) and Arnuk and Saluzzi's 'Broken Markets' (technical for a layman). Lewis is a competent writer of contemporary narrative history across a range of fields, as Tom Holland is competent in popular narrative history of the ancient world. If I were to judge the author on the sloppiness of this one work, I would conclude that, contrariwise, he is not.
4 reviews2 followers
Read
May 1, 2019
This book helped to shine the light on how HFT operates:

1) spoofing - placing fake orders that will be retracted before they ever get hit, to trick other algos into thinking there's a whale. Such algos are called predatory / hunter seekers, as they try to fake out other algos.

2) 0+ scalping - if there's enough "market depth" (liquidity) and the trader is the fastest and thus able to get his buy or sell order filled over other players, it's possible to do a riskless trade that never loses money (hence the name). Since if the market is moving against the trader who has a buy position, he can always shed his position with no loss by selling to the next order since he would be the fastest. And the money making part comes in when there is a real buyer, then being the fastest the trader can push the price up and force the buyer to pay a higher price.

3) Typically HFT algos never hold a position for more than a few seconds. If they detect that the price is moving upwards, their buy and sell orders will move up to ride the wave, but the buy orders will move up slower than the sell orders or they might be left hanging when the tide suddenly changes.

4) With the maker taker fee structure, HFT do not necessarily need to make money on their trade, as they can profit from simply providing liquidity.

5) Much of the information of where the market is moving up or down comes from the exchanges who provide order flow information to the HFT firms, as they want their business and the liquidity they provide.

The book also includes some history on how exchanges evolved to where they are today like maker-taker fee structure, direct execution of trades between users.
It's quite mind boggling to realize that not as long as 40 years back we still had human market makers on an electronic system!

There's a segment on new hedge funds that make use of machine learning to derive signals to buy and hold stocks, which is much more interesting than the predatory way that HFT firms makes their money.

Bonus: a few anecdotes on James Simon of Renaissance Technology fame.
Profile Image for Beauregard Bottomley.
1,238 reviews852 followers
July 22, 2014
The author covers the material so well that even for those who aren't interested in the development of electronic trading will find the story an exciting read. He puts the context around the development and has written the definitive history on the subject.

I'm a big fan of "The Singularity is Near" by Ray Kurzweil and I thought a lot of his telling of the story was influenced by Ray Kurzweil's thinking on AI and such. Near the very end of the book the author brings up Kurzweil and his thinking. He really didn't fit into the story's arc, but I took it as an ode to Kurzweil.

I warn you. The book will give you a queasy feeling in your stomach because he documents so thoroughly how the HST (high speed traders) are systematically taking money away from us because there is not a level playing field for small players like us who invest through our mutual funds or individual stocks and ETFs.
Profile Image for Matan.
5 reviews2 followers
April 10, 2015
The SOES bandits with Josh Levine at the helm take on the antiquated insider blue blooded good ol boys exchanges at the Nasdaq and NYSE. only to triumph and become the evil they sought to destroy. Instead of an insider market maker system they created a brain stealing industry that spends billions on optimising milliseconds. A technorati elite that competes in Gflops.

Josh Levine started an arms race. That culminated today in the creation of a market so disconnected from its roots that it bears little resemblance. As Scott likes to say. Mom and pop players have no game in this business anymore (day trading. Not value investing mind you).

I enjoyed the technical bits even though they were often simplified. The fact everything was named correctly enabled me to follow up rather easily.

We came a long way from the days of the Monster key.
This entire review has been hidden because of spoilers.
180 reviews2 followers
May 31, 2015
I suppose if you knew virtually nothing about modern financial markets and these things that are apparently called . . . com-pu-ters(?) . . . this book might be worth your time. But while there is some useful information buried amid the overwrought prose, this is mostly an exercise in source-stroking and adjective abuse.
Profile Image for Jeremy Stock.
181 reviews33 followers
April 30, 2016
We live in an era of fraud in America. - Michael Lewis

This excellent detailed account of the rise of high frequency trading reminds us yet again that human nature hasn't changed. Selfish ambition still holds sway.

The only question I have is what am I to do about it when thinking of my own investment for the future?
81 reviews17 followers
February 3, 2021
Far too long to merit finishing. Suffers from the, what appears to be a genre staple, attempt to develop background character arcs for the players involved, who happen to be incredibly banal. The actual tech is described in purple prose - "predatory algos", "AI hunter botnets" and so on - and contributes to it's mystification rather than clarification.

Such an incredible waste all round.
Profile Image for Brian Egger.
Author 2 books8 followers
September 21, 2014
Much of the ground covered by Flash Boys, its better-known high-frequency trading counterpart, was first addressed in this book.
10 reviews9 followers
June 10, 2020
Mumbo jumbo. Some good information that could've just been an article.
682 reviews3 followers
January 30, 2020
For a fair amount of time I was reading books about investing and money for obvious reasons. Anyway, I have slowed down on that. However, I still have some books I picked to read still on my Goodreads "want to read" list. Thus, this Dark Pools book. Goodread's blurb about what the book is about is a good intro. Basically it is the story of computers introduction to trading or investing in stocks etc. The characters are interesting. I think the book is well written. By that I mean it is not difficult to read. The writing doesn't use a lot of terminology that is unknown to the average reader who may not know stock investment words. Also it is written in an interesting fashion. The characters are well described and in an interesting fashion, a little color describing personality. The story itself held interest for me because the investment world is interesting to me. I think it is an interesting read, but someone who has no interest in the investing world would probably not enjoy it in my opinion.
Profile Image for Jairo Fraga.
345 reviews28 followers
March 29, 2021
Rather interesting read regarding the revolution of the algos and the U.S. stock market rigging by them.

The author writes well, making the read entertaining, featuring some of Wall Street traders/programmers and how did they manage to control the markets.

Tells about previously successful HFT Bodek, which was ubable to make profit anymore. The book dwells into many stories as how high frequency trading gradually replaced floor market makers, unfortunately for them.

Particularly, the star of the book is the some what unknown Josh Levine. A boy with no grad to sport, but a true genius, which envisioned how this market could one day be fully electronic. Never dropping his jeans and t-shirt at meetings with high profile people on Wall Street.

I won't spoil the many small stories inside, as they are usually not big and are easy to digest (not much technical details).

Recommended reading for anyone who is interested in the evolution of the electronic markets.

Average reading time: 6h
Profile Image for Maxwell Dalton.
155 reviews9 followers
January 15, 2023
As my first non-fiction read in quite a while, I must say this definitely is an interesting one. Dealing with the computerization of the stock markets in both the exchanges and the traders themselves, Patterson brings to light a lot of things that I'm sure most people have little to no idea of, even if you are active in the markets themselves.

That being said, the dialogue that is included along with the tone of what is talked about can be pretty cringey at times (I believe the word "algo" appears once every 10 words or so) and the introduction of so many minimal characters who are probably unnecessary leads to the reader being required to pay very close attention to what is going on otherwise they will just be completely lost.

Still, pretty solid read that is borderline essential to anyone who is interested in both computers and finance.

TL;DR: Very interesting story, could-be-better execution.
Profile Image for Michael Hames.
53 reviews2 followers
January 15, 2022
I came across the name of this book while reading Michael Lewis’s Flash Boys and am glad I gave it a read as it was quite interesting and very easy to read.

While the subject matter is a bit dated now (over 10 years ago) the fact that High Frequency Trading was ever allowed to happen (and I believe still does) when all it does it take money out of the stock market from those who are actually risking their funds to support the stock market is an atrocity and shows just how much corruption is rampant throughout both the US stock market and the regulators who supposed to be overseeing it and protecting the mom and pop investors from predatory behaviour.
Profile Image for Robert.
301 reviews
August 10, 2019
Probably should be read by anyone interested in quant finance. Dark Pools is like a detailed follow up to Flash Boys, but with more of an emphasis on the fascinating concept of evolution in the markets, as algorithms fight against one another to scalp pennies off trades.

Interesting how some or the chief architects of the current system, motivated by the desire to make markets more transparent, ultimately ended up regretting their contributions to the HFT world of today.
19 reviews1 follower
May 26, 2024
Super interesting in-depth look into the evolving and ever-more electronic stock market (both exchanges and high frequency algos) of the late 90s and early 00s. Similar to flash boys but offers more fun stories. Great read
42 reviews1 follower
January 18, 2024
Written Michael Lewis-style to make it more of a page turner, but probably at the expense of some accuracy. But anyway, high frequency traders are all parasites, what a waste of mathematicians.
Profile Image for Lucas.
285 reviews48 followers
February 28, 2015
There are a number of problems with this book that could have been solved by an author with greater technical understanding but the subject matter was interesting and novel to me enough to warrant a higher rating.

Half the major issues with high frequency trading seem like they would be solved by eliminating (through law) the maker taker fees. Both parties to a trade would pay the same fee to the exchange and the incentive to spend a lot of resources making money from being the 'maker' would go away. We'd still have HFT but at least the point of it would be to make money from stocks actually increasing or decreasing in value (or disparities between exchanges/markets).

The writing is too sensational. Colorful analogies abound that don't really explain much.

Use of 'algo' for algorithm is annoying, this is more acceptable if the people interviewed for the book use the term but not if it is just the author.

Overuse of 'artificial intelligence' for what appear to be relatively simple heuristical systems, though it is likely proprietary info and details the author didn't understand or didn't think reader will understand were left out. Another likelihood is the people in the book having been misusing that term themselves to market their software and trading companies.

Depending on answer to above it seems like a lot of money and brain power is being spent on not very smart systems, though the latter part of that may be changing now. I don't think Wall Street is that attractive to the best engineers, so maybe it isn't all that much lost brain power either. Even if money is a huge concern then developing stock trading systems might make someone a millionaire, but this can't compete with the possibility of becoming a billionaire via startups and venture capital in Silicon Valley.

AI applied to the stock market is interesting, but not very fruitful compared to AI to solve tractable problems. It will happen but is also a never ending arms race that reaches a sort of steady state when all profits are consumed by computing and software development costs.

Raid array of hard drives in a single computer is described as distributed computing.

The big data chapter is most interesting and efforts seem mostly unsuccessful, though I think it would take a very large investment to bear fruit. One company in the field which is actually making money is described as doing software driven Buffet-like value investing, which is intriguing. The roi wasn't that high however. A lot of money tied up in value investing with software that is less expensive than paying hedge fund managers who want big bonuses might bring more stability to the market.

What looked to be failing was the attempt to feed the entirety of the internet into a giant machine learning black box that would then make stock choices. There ought to be a way do this successfully but it might take billions to only make millions.

Is there a day-trading equivalent for HFT and software driven investing? Allow the little guy to do anything from writing simple spreadsheet rules to buy or sell at certain points, or interface directly with dark pool APIs on Amazon EC2 instances that are running on server clusters located near exchanges?
Profile Image for Giulio Ciacchini.
391 reviews14 followers
March 21, 2022
A compelling and entertaining narrative of how and why Wall Street was conquered by algorithms and machine learning.
The book is centred around the Island ECN (Electronic Communication Network) breakthrough, created by the visionary programming genius Joshua Levine, who changed forever the way in which investors trade: he changed not just the rules of the game, but the game itself, moving from physical to electronic trading.
This spurred a classic fight between the new (machines-Island) and the old (humans-NASDAQ, NYSE), who will eventually turn to technology and embrace the change.
One major change was the decimalisation: to start trading stocks in penny increments, or decimals, rather than the fractions NASDAQ and NYSE had always used, crimping their profits.
[Island was founded in 1997 by Jeff Citron and Levine with funding from Datek Online Holdings Corporation. Island was an immediate hit, its popularity driven in part by the day trading fad of the late 1990s. The effects were felt throughout the stock world. Competing ECNs were soon opening their virtual doors, and NYSE and NASDAQ were compelled to look for ways to simplify their business in order to meet the challenge. Levine himself fueled the competition with his outspoken criticisms of NYSE and NASDAQ as anticompetitive monopolies. Thanks to Levine's efforts, the NYSE eventually repealed its rule prohibiting its members from trading substantial amounts of NYSE-listed stock off the trading floor. The repeal made it possible for Island to begin trading in stock listed on the New York Stock Exchange].

Even though I was already familiar with most of the topics in the book, I have enjoyed its flow and the chronological way in which events are described.

On the negative side the author is quite biased against the rise of trading machines, and he fails to dig deeper around the technical aspects of AI beyond stressing out the insane speed at which the trade-bot were reaching.
He just underlines how the competition became around having the latest and most powerful algorithm to trade efficiently and even make a small profit on each trade, which multiplied by millions will eventually add up.

He also makes some sensationalism about how algorithms work, as to a non-technical person it may seem complicated, but in the end we are just talking about the rules and comments that the machine executes.
I say sensationalism, because in 2022 the markets are still out there as powerful, complicated and fast as ever, with all their flaws, but also the benefits of democratisation brought about by technology.
Profile Image for Ed Terrell.
506 reviews26 followers
July 7, 2015
On May 6, 2010 at 2:32 pm, the stock market dropped 800 points in a minute, ultimately losing 9% in 15 minutes before finally recovering.

I’ve just completed two books by Patterson: The Quants and Dark Pools. They both deal with the new stock traders and technologies that have taken Wall Street by storm. Patterson does a great job with interweaving the personalities behind the formulas, acronyms, and money with the events that have taken place and that are reshaping our future. The Quants is a primer on credit default swaps, gaussian copula functions, and credit default obligations which formed the triumvarite that brought us to the brink of the second Great Depression in 2008. As such, it is a must for anyone wanting to know more about the underlying causes (okay, greed played no small part!) and tools that made it all possible.

Dark Pools, takes off where The Quants stop and brings us up to date on the new high speed trading that is taking place today, where speed to buy and sell stocks in microseconds, earns the big bucks. From humble mathematical beginnings, such as genetic algorithms, machine learning, and expert systems we suddenly find ourselves sucked into "toxic dark pools swarming with predator algorithms". These “algos" leap in front of large institutional orders, driving up the price and pocketing the difference. Originally, high frequency trading (HFT) was seen to bring liquidity and stability to the markets, however, when the going gets tough, these “tough guys” get going and liquidity disappears as they all head for the exit. Due to the speed at which they can execute orders, a lot can happen in a hurry as on March 6 and its trillion dollar drop. Dark Pools leaves us hanging and imagining and worrying.
Profile Image for Paul.
2,230 reviews
June 21, 2014
Patterson has written a fascinating and detailed history of the rise of computers and bots in the American, and now global stock markets.

He has got potted histories of the major players in this business and shows how they wrestled power and control and most importantly money from the old guard who controlled the market before. He shows how the raise of computer generated trading has massively increased the churn of stocks, where the fastest to buy or sell is the one who makes the most money. There is a chapter on the flash crash, that took place on the 6th May 2010, where the computer started to sell and sell, causing the US stock market to drop 9% in minutes.

Most frighteningly he looks at the new computerised way that is coming AI. These machines take data from all over the web, from financial web sites to social media and make scarily accurate guesses as to the financial performance of a particular share from this feed aggregation. Not only are they demonstrating that they can outthink humans, but they can react almost instantly.

You don't expect a business book to read like a thriller, but this does. It does get technical at some points, but it is written well and is very readable. The implication behind out of control stock bots on the global economy does not bear thinking about.
Profile Image for Ethan.
20 reviews
October 25, 2014
For the most part, this is an excellent historical account of how the current form of the markets and high-frequency trading came to be. It covers many of the people and the history of the digital revolution in trading between 1990 and when the book was published.

However, I felt that some of the technical descriptions were a bit lacking in detail and sometimes conveyed a potentially inaccurate representation of technical culture and knowledge common among programmers and other technical people. As someone with that background, it was fairly simple to sift some of those cases, but I worry that more complex situations had similar problems that I was not able to immediately recognize.

Dispite this concern, the book is still a very worth-while read. It is an interesting story with a large amount of facts and background that allow the reader to come to some of their own decisions (though others are more broadly stated).
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