It is not often that I read a book with great interest and
appreciation without really understanding it at all. “Flash Boys” by Michael
Lewis has been greeted by smarter people than myself who rave about finally
getting some understanding on the murky business of HFT (High FrequencyTrading).
Taking a step back, I held somewhat dated views of stock
trading. I generally knew that one could go to a broker, e.g., Charles Schwab,
with money to buy stock. Once a decision was made regarding the stock and the
price that one would pay for the stock, the trade would be entered through a
computer if the price was acceptable to buyer.
Over the last few years, I became aware of HFT which I
understood as extraordinarily fast computers designed to trade stock based on
algorithms coded by brainy people who would know when to buy a stock at the
time of the buyer’s interest was initiated but before the deal was consummated.
In short, the HFT trader would actually make money buying and selling the stock
you want in the millisecond between your broker’s computer request and its
completion due to the speed of the computer. While we are dealing with a penny
being made per dollar of the transaction, it amounts to BILLIONS in any given
year. And the gains are at the expense of the investor! The HFT business never
loses because it knows what is going to happen before it is transacted!
And then, I heard of the “dark pools” whereby major
investment banks would essentially buy and sell stocks without going through an
exchange, e.g., New York Stock Exchange, and then report the transaction after
the fact. Again, the gain would be at the expense of the investor who would be
clueless of this transaction.
Michael Lewis articulates this complex world through the
people who actually understood the process and wanted to change it by starting
a separate exchange that would promise transparency and honesty to the
investor.
I cannot say that this whole world of HFT and dark pools is
clear to me. What is comforting is that the most of the people in the stock
trading business do not understand it either. Apparently, the world of computer
coders and the brokers is not shared. The coders only know the technical
matters involved in the computer’s design without knowing much about the
business of buying and selling stocks, and vice versa.
The heroes of this book become vibrant people whose interest
in ensuring a more secure and trustworthy environment for stock exchanges
motivated them to leave a world a relative security with high monetary rewards
(though far, far less than the brokers) to start a brand new exchange (IEX)
without any guarantees of success, though in fact, most successful.
We can hope that the more knowledge people have of this
world of trading stocks, the more honest it will be.