Free Ebook , by Michael Lewis
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, by Michael Lewis
Free Ebook , by Michael Lewis
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Product details
File Size: 1073 KB
Print Length: 323 pages
Publisher: W. W. Norton & Company; 1 edition (March 31, 2014)
Publication Date: March 31, 2014
Sold by: Amazon Digital Services LLC
Language: English
ASIN: B00HVJB4VM
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Amazon Best Sellers Rank:
#10,319 Paid in Kindle Store (See Top 100 Paid in Kindle Store)
I know some people who are treating this book as if it were the newest book of the Bible. Well, in fairness, it does contain some significant revelations, and it's a tale of good and evil. That's the good news.The bad news is that the book is (a) extremely disjointed and (b) full of extraneous information, some of it personal and some seemingly irrelevant. Thus, the book is longer than it should be, and the extraneous information muddles things up for no good reason. The basic story that Lewis tells is good; it's got good guys and not-so-good guys, financial chicanery and other things (sorry, no sex) that would be interesting on their own. And he certainly has a point - that our market system is rigged (a point with which I'm inclined to agree). But then he distracts us with lots of techno-jargon; the story of Goldman Sachs's role in prosecuting someone for stealing what seems to be public data that's of little use to him; and a weird discussion at the end about women bikers. (In fairness, the prosecution is not entirely irrelevant, but Lewis seems to be unsure whether to use it as a paradigm for Goldman's intrinsic evil or good, so it turns out to be unnecessary.)I've never been a big fan of Lewis; he's always struck me as being inordinately impressed with his own cleverness (not that he's not clever), and this book doesn't do anything to dispel my prejudices.Lastly, it's interesting (but another disappointment) that while Lewis praises his copy editor, I caught two rather obvious typos early on. I know he's a ragingly successful author, but really!
If you have been watching economic news this week, you will have heard that the British pound collapsed in a “flash crash.†Most news stories leave it at that. (I suspect that’s because they don’t know what a flash crash really is.) Put simply (and in Flash Boys Michael Lewis explains this recurring phenomenon quite simply) a flash crash is how high frequency traders use computers, multiple exchanges and time to abuse the rules. Now that I’ve summarized that, let me back up a second and deconstruct the sentence. First, what are the rules? In 2007, after brokers were found to have been abusing customers’ trust once too often, the government came out with what’s called Reg NMS. This regulation (and here I am just going to quote Michael Lewis directly because I don’t think I can say it any better than he did). Reg NMS mandated that brokers buy shares at the best price. “To define best price, Reg NMS relied on the concept of the National Best Bid and Offer. If an investor wished to buy 10,000 shares of Microsoft, and 100 shares were offered on the BATS exchange at $30 a share, while the full 10,000 listed on the other twelve exchanges were offered at $30.01, his broker was required to purchase the 100 shares at Bats before moving on to other exchanges.â€This meant that anyone with a computer can see where a purchase is going to be made and for how much. So if you have a faster connection (and several exchanges where you can sell a few shares of a stock, you can already see how you can make money.) Sure, you won’t make a lot of money from any one trade. Maybe less than half a cent here and half a cent there. But that adds up. I know this from first-hand experience. The other day at work, I was trying to calculate what would the cost be of a service was excluded from a package of services. And my calculation kept being almost a billion off. I did it and re-did and re-did it every which way I could think of. I even pulled down my stats book to see if my math was off. Nothing. I got up and went for a cup of coffee just to take a break from this ridiculous problem and when I sat down again, I saw it. It was a rounding error. To be exact it was a rounding error in the one/thousandth decimal place. But I was dealing with billions of dollars and that rounding error made quite a difference. So yes, parts of pennies add up. But wait, there’s more.The way the best price is computed is when an exchange computes all the bids and offers on a particular stock. This computation is done by a government computer and if you know one thing about government, you will know that it takes years to upgrade computers. That means that if you have your own, faster computer you can “front-run†the official best price and sell and buy 100s of shares at the “real†best price. Sure it will be a “rounding error†but as I said before, those rounding errors matter. So a rule that was intended to create equity and transparency in the market in fact institutionalized inequality between the traders who had access to the super-fast computers and those who did not. Only the former would make money from these rounding errors.But wait, there is yet more. To make full use of Reg NMS you also need many different exchanges or dark pools and dark cables. And guess what, both exist. Dark cables are cables that are optimized for speed of transaction. Sure it’s a millisecond difference or even less but in that time you can get a lot of rounding errors. Dark pools are, in essence, proprietary exchanges. They exist to make it easier for institutional investors (like the folks to whom you entrust your pension and mortgage, for example) to trade in large blocks. So, for example if you have one million shares of Microsoft you want to sell (or buy) but don’t want your identity known, you would rather sell/buy those shares away from the glaring eye of the public transaction. Here’s the problem, if your are a high frequency trader, you (by definition) have a super-fast computer and access to dark cables. That means you can “ping†the many, many dark pools that have been set up. By some estimates, 40% of all trading is now done inside dark pools. And that in turn means you can know, well before the government-issued slow computers have finished calculating the best price what the real selling price is. That’s one heck of a rounding error in your pocket.And finally, to make all this work, you need volatility. All volatility means is that the price of something moves up and down a lot. And obviously if it does that, there is a lot more room for a high-frequency trader to essentially insert him/herself in the middle of that trade. Basically here’s the way it works. You want to buy those 10,000 shares of Microsoft for $30. There’s a dark pool that will sell 100 of them to you for that price. I, as a high-frequency trader, ping that dark pool, know what the price you’re willing to buy for is and all the other prices out there and where you will buy from next. So I go and buy the next batch of Microsoft shares that are selling (as you will recall at $30.01). Now, your broker, by law, has to come and buy the shares from me. Except I sell the shares now at $30.1001. And right there, in less than the blink of an eye I have made almost $10. And that’s from a mere 9,900 shares—a small trade. So what high-frequency traders do in effect is charge a tax for trading. And that tax (like most taxes) makes economic activity, in this case people’s willingness to trade to decrease. It also means that flash crashes, caused when a front-running computer algorithm gets too clever by half, are inevitable.In Flash Boys, Lewis explains all of this a little at a time. In some ways, the book reads like a great detective story. And like a great detective story, it is eminently readable because at its heart is a kind of hero: Brad Katsuyama. Brad sets out to hire a lot of computer programmers to beat the system. First he introduced Thor. This was a platform that enabled you to trade more slowly and then a brand new exchange called IEX (an exchange—and yes, it got the license to be an actual exchange) that did the same thing. The idea behind Thor and IEX seems counter-intuitive but in a high-frequency world it works. If you trade many thousands of shares per trade, then it makes sense that your order should arrive at all the exchanges/dark pools at the same time. That way no-one can ping/front-run you. You will not, in other words, be paying a tax on your trade. So to get the high-frequency traders out of the loop, you need to trade just slowly enough that your orders arrive at all exchanges at the same time.This is the story of how Brad and the motley crew he gathered around him came up with that idea, the push-back they initially got from the industry and how they eventually sold the industry, including Goldman Sachs, on the concept. It is a story well worth reading. I highly recommend it.
One of the things I enjoy about Lewis's writing is his ability to explain difficult and complicated subjects. This one on high speed stock trading was no exception. Even though I am in the financial services field, there are aspects of this topic that were totally mystifying. Glad to see I had a lot of company and glad to see steps are being taken to reduce the opportunity to pick your pocket when trading stocks. The techniques may be legal, but they are far from fair or ethical. I think this book is best suited for those with some background in finance or serious investors. An enjoyable read if your interest lies in this direction.
Well, maybe I don't love it. Maybe I like it. I am prejudiced. Michael Lewis is unmatched in being able to explain clearly some of the more complex machinations of the money markets. In this case, the issue is manipulation of the stock market by having better technology..and putting it close to trading floor. OK, I know that does not make much sense on the face of it, but read the book. But it is another way the large, programmatic traders can beat the little guy--and Lewis makes the point without it becoming a Message. The Canadians are heroes (and how often do you read that in a review of a Wall Street subject?) The market is generally unscrupulous. It is unlikely to be fixed (if it is 'fixable') so long as we don't understand it..and most of us do not. Michel Lewis is the guy who can explain everything.
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