Showing posts with label HFT. Show all posts
Showing posts with label HFT. Show all posts

Wednesday, February 19, 2014

Financial transaction tax is now cool

I'm glad to see some of my favorite stars getting behind an idea that is so smart, simple and timely!



A financial transaction tax will soon take effect in Europe. The UK and US should get on board with it -- thereby discouraging a race to the bottom.

The tax will only affect high-frequency "robot" traders; 99 percent of investors won't even notice it. But it will help restore our countries' fiscal health, and discourage high-speed trading that has no social value.


By Simon Chouffot
February 19, 2014 | CNN

Thursday, May 2, 2013

Cuban: Twitter 'hackcrash' shows danger of HFT

There is an elegant way to solve the problems posed by High Frequency Trading: a financial transactions tax that would be so small as to bother only the algorithm-driven robot traders that make thousands of trades in a second.

UPDATE (05.08.2013): (HT: Ritholtz) Here is a nifty video from Nanex showing 1/2 second of HFT of Johnson & Johnson stock on May 2, 2013:





By Mark Cuban
May 2, 2013 | Blog Maverick

In case you missed it, the @AP twitter account was hacked , which resulted in a tweet that sent markets spiraling down only to recover a few minutes later once it was revealed that the tweet was a fake. Here is more info.

Why did the market head lower so quickly ?  This is from Paste Magazine:

“The events last Tuesday were likely caused by the news-reacting algorithms that are designed to electronically read and interpret machine-readable news,” said in an emailed response by Irene Aldridge, a hedge fund consultant on algorithms and author of High-Frequency Trading: A Practical Guide to Algorithmic Strategies and Trading Systems. “Most of the web content is machine-readable, so lots of algos are built on reading and reacting to news such as the Twitter hack… Clearly in the Twitter case, trading machines did not ascertain credibility of the tweet.”

So how does the future of HFT look in light of Tuesday’s AP hack tweet incident?

Aldridge said in terms of the technology, “going forward, many algorithm designers will take into account the Tuesday situation, and will build ever more sophisticated approaches.”

There is no question that there is an ongoing arms race between algorithm designers, as well as a technology race to improve Language Processing and Translation abilities (disclosure, I'm an investor in Linguasys).  Billions of dollars are being invested to make trading without humans faster, cheaper, smarter. The problem is that no matter how smart you make machines, they will never be smart enough in our lifetime to detect all levels of deceit and fraud. Particularly online.

No one has any idea, other than the traders using the algorithms, which twitter accounts the algorithms follow and read. The same with websites. Which do they track and read ?  If its worth it for someone to hack the @AP twitter feed in order to attempt to destabilize the markets why wouldn’t the same people or others with similar goals set up thousands of twitter accounts that for some extended period are a solid source of news and information, attempting to build  a following that include algorithms reading their feed , knowing that at some point they will tweet market moving fake information ? (Note, you don't have to actually follow an account to get access to their feeds, there are services that provide the twitter hose to financial companies).

It costs absolutely nothing to try to make this happen.  If you follow the writings of Nanex, you know that mini flash crashes happen in individual stocks all the time. That there are algorithms fighting algorithms all the time.  Its to the point where it sounds like the plot of a science fiction movie and it is.

Our markets are at risk.  I can’t quantify how big a risk there is, but I can tell you this, as long as there are algorithmically driven trades that happen in thousandths of a second, we can not eliminate that risk.  As long as that risk exists, there is a significant opportunity for hackers , terrorists (yes terrorists) and crooks to negatively impact our market to the tune of billions of dollars and possibly. This is the rise of the software controlled market. 

There is no such thing as bug free software.  If you are an investor, learn how to hedge.

Thursday, August 25, 2011

Levy a transaction tax on Wall Street!

Professor Folbre's is right to support the tiny transaction tax on stock trades, which are oddly exempt from sales tax, unlike other economic transactions. For normal holders of stocks this tax would be virtually unnoticeable.

Still, I'm surprised she did not even mention that high-frequency "robot" traders have likely been responsible, at least partly, for wild stock swings over the past two weeks, with humans trying to catch up. High-frequency trading (HFT) also caused the "flash crash" on May 6, 2010. Well over 70% of trades in the U.S. are already performed by machines, since algorithm-driven computer traders may make many trades per second. If such a transaction tax would not discourage firms from using HFT strategies, it would at least cut our federal budget deficit -- by at least $175 billion per year!



By Nancy Folbre
August 22, 2011 | New York Times - Economix

Most of us pay state and local sales taxes on most things we buy, and most casino gambling is subject to state taxes ranging from up to 6.75 percent in Nevada to 55 percent on slot machines in Pennsylvania.

But speculative purchases of stocks, bonds and other financial instruments in the United States go untaxed but for a tiny fee (less than a half-cent) on stock trades that helps finance the Securities and Exchange Commission.

In Britain, by contrast, a 0.5 percent tax on stock transactions raises about $40 billion a year. President Nicolas Sarkozy of France and Chancellor Angela Merkel of Germany recently announced plans to introduce a similar tax in the 27 nations of the European Community.

It is variously called a "transactions tax," a "financial transactions tax," a "security transaction excise tax" or a Tobin tax (after the Nobel Prize-winning economist James Tobin, who famously argued for its application to foreign exchange purchases in the late 1970s).

By any name, Wall Street hates it, because it would cut into trading profits. But proponents like Dean Baker, co-director of the Center for Economic and Policy Research assert that it would primarily affect short-term "noise traders" and discourage speculation rather than productive investment.

Less speculation could lead to less volatility in prices, encouraging long-term investors.

Further, a sales tax on Wall Street of 0.5 percent could raise up to $175 billion in tax revenue a year, even if, by discouraging frequent trades, it cuts the total number of transactions in half.

A small financial transaction tax proposed by Representative Peter DiFazio, Democrat of Oregon, and supported by Senator Tom Harkin, Democrat of Iowa, the Let Wall Street Pay for the Restoration of Main Street Act (with specific details of a co-sponsored bill still being negotiated) is likely to raise less revenue.

Plenty of highly respected economists support the basic concept, and plenty disagree. In a recent review of the literature, Neil McCulloch and Grazia Pacillo of the Institute of Development Studies in Britain conclude that it is unlikely to reduce speculation but nonetheless represents a relatively good source of tax revenue. A recent report by Thornton Matheson, published by the International Monetary Fund, expresses negative views.

An engaging summary of the pros and cons can be found in a videotaped debate sponsored by the Center for the Study of Responsive Law on July 8 as part of its "Debating Taboos" series.

My University of Massachusetts colleague Robert Pollin argues in favor, while James Angel of Georgetown argues against.

Professor Angel insists that short-term traders are not primarily speculators and describes them as a healthy part of the financial ecosystem that might be killed off. Professor Pollin's view, with which I agree, is that short-term trading has increased enormously in recent years, with no positive impacts on economic efficiency. In any case, I don't think a 0.5 percent tax on transactions will cause serious fatalities.

Professor Angel also points out that a tax on financial transactions will be passed on, at least in part, to all investors, with negative consequences for retirement savings. But all taxes are passed on, at least in part, to consumers. I agree with Professor Pollin when he argues that the effect of a financial transactions tax on most people would be very small compared with other sales taxes.

Economists point out that sales taxes discourage consumption, which is better than discouraging investments that can pay off in the future. But many consumption decisions that ordinary people make have important consequences for future productivity.

As Professor Pollin points out, current sales taxes bite those who buy materials to increase energy conservation in their homes or purchase a more fuel-efficient car.

My own research emphasizes that parental expenditures on children, as well as public spending on health and education, represent a form of investment in human capital.

Most state and local sales taxes are very regressive, with low-income families paying more as a percentage of their income. A proposed national sales tax, or a value-added tax, would have an even more negative impact on families at the bottom.

Our current tax policies favor speculative investment in financial instruments over productive investments in human capabilities. This imbalance helps explain why nurses' unions in the United States have been particularly outspoken advocates of a financial transactions tax.

As they put it: "Heal America. Tax Wall Street."