By David J Emory
There has been a lot of chatter online recently about high frequency trading, or HFT in short. But what is high frequency trading? How does it work? And how does it impact the market.
Here is a quick example that should serve to illustrate how high frequency traders make their money, some would say at the expense of retail investors and traditional asset managers.
Let us imagine for a moment that IBM shares are currently trading around $130.40 per share. An institutional investment manager wants to buy 200,000 shares of IBM stock, and is prepared to pay up to $130.65. So he issues a limit order to his broker to buy the shares for up to $130.65.
The way HFT works is as follows. The HFT systems are constantly sending "flash orders" into the market to detect where big limit orders such as this on reside. A flash order is a small order that is either filled immediately (in less than a thousandth of a second), or cancelled. So the HFT systems send their flash sell orders in at $130.40, $130.45, $130.50, $130.55, $130.60, $130.65 and $130.70. When the order at $130.70 doesn't get interest, the HFT system knows that the buy limit order is somewhere around $130.65, so is able to take advantage of that knowledge by buying shares at the current level of $130.40, knowing they can be offloaded at up to $130.65.
Many market commentators and politicians, such as Senator Ted Kaufman (D, Del) say this is nothing more than a sophisticated form of front running and should be immediately outlawed. Supporters of high frequency trading (any one of the big Wall Street firms, for example) say that the HFT systems make the market more efficient. Websites such as the High Frequency Trading Review try to balance both viewpoints and provide informed, objective commentary.
One thing is for certain however and that is as long as the big Wall Street firms are making money using these strategies, there will be a clamor for more transparency, openness and regulation to ensure they are not gaining any unfair advantage.
http://highfrequencytradingreview.com/
Here is a quick example that should serve to illustrate how high frequency traders make their money, some would say at the expense of retail investors and traditional asset managers.
Let us imagine for a moment that IBM shares are currently trading around $130.40 per share. An institutional investment manager wants to buy 200,000 shares of IBM stock, and is prepared to pay up to $130.65. So he issues a limit order to his broker to buy the shares for up to $130.65.
The way HFT works is as follows. The HFT systems are constantly sending "flash orders" into the market to detect where big limit orders such as this on reside. A flash order is a small order that is either filled immediately (in less than a thousandth of a second), or cancelled. So the HFT systems send their flash sell orders in at $130.40, $130.45, $130.50, $130.55, $130.60, $130.65 and $130.70. When the order at $130.70 doesn't get interest, the HFT system knows that the buy limit order is somewhere around $130.65, so is able to take advantage of that knowledge by buying shares at the current level of $130.40, knowing they can be offloaded at up to $130.65.
Many market commentators and politicians, such as Senator Ted Kaufman (D, Del) say this is nothing more than a sophisticated form of front running and should be immediately outlawed. Supporters of high frequency trading (any one of the big Wall Street firms, for example) say that the HFT systems make the market more efficient. Websites such as the High Frequency Trading Review try to balance both viewpoints and provide informed, objective commentary.
One thing is for certain however and that is as long as the big Wall Street firms are making money using these strategies, there will be a clamor for more transparency, openness and regulation to ensure they are not gaining any unfair advantage.
http://highfrequencytradingreview.com/